{"id":1844,"date":"2026-03-25T21:43:05","date_gmt":"2026-03-25T21:43:05","guid":{"rendered":"https:\/\/www.tech-posts.com\/vi\/transitioning-from-procedural-to-object-oriented-thinking\/"},"modified":"2026-03-25T21:43:05","modified_gmt":"2026-03-25T21:43:05","slug":"transitioning-from-procedural-to-object-oriented-thinking","status":"publish","type":"post","link":"https:\/\/www.tech-posts.com\/vi\/transitioning-from-procedural-to-object-oriented-thinking\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn OOAD: Chuy\u1ec3n \u0111\u1ed5i t\u1eeb t\u01b0 duy th\u1ee7 t\u1ee5c sang t\u01b0 duy h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng"},"content":{"rendered":"
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\"Whimsical<\/figure>\n<\/div>\n

Chuy\u1ec3n \u0111\u1ed5i t\u1eeb t\u01b0 duy th\u1ee7 t\u1ee5c sang t\u01b0 duy h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 h\u1ecdc c\u00fa ph\u00e1p m\u1edbi. N\u00f3 \u0111\u1ea1i di\u1ec7n cho m\u1ed9t s\u1ef1 thay \u0111\u1ed5i c\u0103n b\u1ea3n trong c\u00e1ch b\u1ea1n nh\u1eadn th\u1ee9c v\u1ec1 d\u1eef li\u1ec7u, h\u00e0nh vi v\u00e0 m\u1ed1i quan h\u1ec7 gi\u1eefa ch\u00fang. Trong l\u0129nh v\u1ef1c Ph\u00e2n t\u00edch v\u00e0 Thi\u1ebft k\u1ebf H\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng (OOAD), s\u1ef1 chuy\u1ec3n h\u01b0\u1edbng t\u01b0 duy n\u00e0y l\u00e0 n\u1ec1n t\u1ea3ng \u0111\u1ec3 x\u00e2y d\u1ef1ng c\u00e1c h\u1ec7 th\u1ed1ng m\u1ea1nh m\u1ebd, m\u1edf r\u1ed9ng \u0111\u01b0\u1ee3c. Nhi\u1ec1u nh\u00e0 ph\u00e1t tri\u1ec3n b\u1eaft \u0111\u1ea7u b\u1eb1ng vi\u1ec7c t\u1eadp trung v\u00e0o c\u00e1c h\u00e0m v\u00e0 tr\u00ecnh t\u1ef1, nh\u01b0ng k\u1ef9 thu\u1eadt chuy\u00ean nghi\u1ec7p \u0111\u00f2i h\u1ecfi ph\u1ea3i nh\u00ecn nh\u1eadn kh\u00f4ng gian v\u1ea5n \u0111\u1ec1 qua l\u0103ng k\u00ednh c\u1ee7a c\u00e1c th\u1ef1c th\u1ec3 t\u01b0\u01a1ng t\u00e1c v\u1edbi nhau.<\/p>\n

B\u00e0i vi\u1ebft n\u00e0y kh\u00e1m ph\u00e1 nh\u1eefng kh\u00e1c bi\u1ec7t c\u1ea5u tr\u00fac s\u00e2u s\u1eafc gi\u1eefa hai m\u00f4 h\u00ecnh n\u00e0y. Ch\u00fang ta s\u1ebd xem x\u00e9t c\u00e1ch t\u00e1i c\u1ea5u tr\u00fac qu\u00e1 tr\u00ecnh suy ngh\u0129 c\u1ee7a b\u1ea1n \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c nguy\u00ean t\u1eafc h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng m\u00e0 kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o c\u00f4ng c\u1ee5 hay s\u1ea3n ph\u1ea9m c\u1ee5 th\u1ec3. M\u1ee5c ti\u00eau l\u00e0 nu\u00f4i d\u01b0\u1ee1ng m\u1ed9t tri\u1ebft l\u00fd thi\u1ebft k\u1ebf \u01b0u ti\u00ean t\u00ednh \u0111\u00f3ng g\u00f3i, t\u00ednh module v\u00e0 t\u00ednh r\u00f5 r\u00e0ng.<\/p>\n

Hi\u1ec3u r\u00f5 m\u00f4 h\u00ecnh th\u1ee7 t\u1ee5c \ud83e\udde9<\/h2>\n

L\u1eadp tr\u00ecnh th\u1ee7 t\u1ee5c t\u1ed5 ch\u1ee9c m\u00e3 ngu\u1ed3n th\u00e0nh c\u00e1c th\u1ee7 t\u1ee5c ho\u1eb7c quy tr\u00ecnh th\u1ef1c hi\u1ec7n c\u00e1c h\u00e0nh \u0111\u1ed9ng tr\u00ean d\u1eef li\u1ec7u. Trong m\u00f4 h\u00ecnh n\u00e0y, d\u1eef li\u1ec7u v\u00e0 h\u00e0nh vi th\u01b0\u1eddng t\u00e1ch bi\u1ec7t. Lu\u1ed3ng \u0111i\u1ec1u khi\u1ec3n th\u01b0\u1eddng theo h\u01b0\u1edbng t\u1eeb tr\u00ean xu\u1ed1ng, chuy\u1ec3n t\u1eeb h\u00e0m n\u00e0y sang h\u00e0m kh\u00e1c d\u1ef1a tr\u00ean m\u1ed9t tr\u00ecnh t\u1ef1 b\u01b0\u1edbc \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh.<\/p>\n

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  • T\u1eadp trung v\u00e0o d\u1eef li\u1ec7u:<\/strong>C\u00e1c c\u1ea5u tr\u00fac d\u1eef li\u1ec7u th\u01b0\u1eddng l\u00e0 to\u00e0n c\u1ee5c ho\u1eb7c \u0111\u01b0\u1ee3c truy\u1ec1n r\u00f5 r\u00e0ng gi\u1eefa c\u00e1c h\u00e0m.<\/li>\n
  • T\u1eadp trung v\u00e0o h\u00e0m:<\/strong>\u0110\u01a1n v\u1ecb t\u1ed5 ch\u1ee9c ch\u00ednh l\u00e0 h\u00e0m ho\u1eb7c th\u1ee7 t\u1ee5c con.<\/li>\n
  • Lu\u1ed3ng tu\u1ea7n t\u1ef1:<\/strong>Th\u1ef1c thi tu\u00e2n theo m\u1ed9t \u0111\u01b0\u1eddng \u0111i tuy\u1ebfn t\u00ednh, th\u01b0\u1eddng b\u1ecb chi ph\u1ed1i b\u1edfi c\u00e1c c\u1ed5ng logic v\u00e0 v\u00f2ng l\u1eb7p.<\/li>\n
  • Tr\u1ea1ng th\u00e1i c\u00f3 th\u1ec3 thay \u0111\u1ed5i:<\/strong>D\u1eef li\u1ec7u th\u01b0\u1eddng \u0111\u01b0\u1ee3c thay \u0111\u1ed5i tr\u1ef1c ti\u1ebfp, d\u1eabn \u0111\u1ebfn c\u00e1c chu\u1ed7i ph\u1ee5 thu\u1ed9c ph\u1ee9c t\u1ea1p.<\/li>\n<\/ul>\n

    M\u1eb7c d\u00f9 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p th\u1ee7 t\u1ee5c hi\u1ec7u qu\u1ea3 v\u1edbi c\u00e1c \u0111o\u1ea1n m\u00e3 \u0111\u01a1n gi\u1ea3n ho\u1eb7c c\u00e1c t\u00e1c v\u1ee5 tuy\u1ebfn t\u00ednh, ch\u00fang c\u00f3 th\u1ec3 tr\u1edf n\u00ean kh\u00f3 b\u1ea3o tr\u00ec khi \u0111\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a h\u1ec7 th\u1ed1ng gia t\u0103ng. Vi\u1ec7c thay \u0111\u1ed5i m\u1ed9t ph\u1ea7n c\u1ee7a h\u1ec7 th\u1ed1ng th\u01b0\u1eddng \u0111\u00f2i h\u1ecfi ph\u1ea3i hi\u1ec3u r\u00f5 t\u00e1c \u0111\u1ed9ng lan truy\u1ec1n qua nhi\u1ec1u h\u00e0m. S\u1ef1 thi\u1ebfu v\u1eafng t\u00ednh \u0111\u00f3ng g\u00f3i n\u00e0y khi\u1ebfn vi\u1ec7c ph\u00e2n t\u00edch quy m\u00f4 l\u1edbn tr\u1edf n\u00ean th\u00e1ch th\u1ee9c.<\/p>\n

    T\u01b0 duy h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng \ud83e\udde0<\/h2>\n

    Ph\u00e2n t\u00edch v\u00e0 Thi\u1ebft k\u1ebf H\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng (OOAD) \u0111\u1ea3o ng\u01b0\u1ee3c g\u00f3c nh\u00ecn. Thay v\u00ec h\u1ecfi “t\u00f4i c\u1ea7n nh\u1eefng h\u00e0m n\u00e0o \u0111\u1ec3 x\u1eed l\u00fd d\u1eef li\u1ec7u n\u00e0y?”, b\u1ea1n s\u1ebd h\u1ecfi “nh\u1eefng \u0111\u1ed1i t\u01b0\u1ee3ng n\u00e0o t\u1ed3n t\u1ea1i trong l\u0129nh v\u1ef1c n\u00e0y, v\u00e0 ch\u00fang giao ti\u1ebfp v\u1edbi nhau nh\u01b0 th\u1ebf n\u00e0o?”. C\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng k\u1ebft h\u1ee3p tr\u1ea1ng th\u00e1i (d\u1eef li\u1ec7u) v\u00e0 h\u00e0nh vi (ph\u01b0\u01a1ng th\u1ee9c) th\u00e0nh m\u1ed9t \u0111\u01a1n v\u1ecb duy nh\u1ea5t.<\/p>\n

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    • T\u1eadp trung v\u00e0o th\u1ef1c th\u1ec3:<\/strong>H\u1ec7 th\u1ed1ng \u0111\u01b0\u1ee3c m\u00f4 h\u00ecnh h\u00f3a xung quanh c\u00e1c th\u1ef1c th\u1ec3 th\u1ef1c t\u1ebf ho\u1eb7c kh\u00e1i ni\u1ec7m.<\/li>\n
    • \u0110\u00f3ng g\u00f3i h\u00e0nh vi:<\/strong>D\u1eef li\u1ec7u \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 kh\u1ecfi truy c\u1eadp tr\u1ef1c ti\u1ebfp. T\u01b0\u01a1ng t\u00e1c x\u1ea3y ra th\u00f4ng qua c\u00e1c giao di\u1ec7n \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh.<\/li>\n
    • Truy\u1ec1n tin nh\u1eafn:<\/strong>C\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng g\u1eedi tin nh\u1eafn cho nhau \u0111\u1ec3 y\u00eau c\u1ea7u h\u00e0nh \u0111\u1ed9ng, thay v\u00ec thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i n\u1ed9i b\u1ed9 c\u1ee7a nhau tr\u1ef1c ti\u1ebfp.<\/li>\n
    • Qu\u1ea3n l\u00fd tr\u1ea1ng th\u00e1i:<\/strong>M\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng ki\u1ec3m so\u00e1t tr\u1ea1ng th\u00e1i ri\u00eang c\u1ee7a n\u00f3, gi\u1ea3m thi\u1ec3u c\u00e1c ph\u1ee5 thu\u1ed9c b\u00ean ngo\u00e0i.<\/li>\n<\/ul>\n

      S\u1ef1 chuy\u1ec3n \u0111\u1ed5i n\u00e0y l\u00e0m gi\u1ea3m s\u1ef1 li\u00ean k\u1ebft gi\u1eefa c\u00e1c th\u00e0nh ph\u1ea7n. N\u1ebfu b\u1ea1n c\u1ea7n thay \u0111\u1ed5i c\u00e1ch m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng ho\u1ea1t \u0111\u1ed9ng b\u00ean trong, c\u00e1c ph\u1ea7n kh\u00e1c c\u1ee7a h\u1ec7 th\u1ed1ng kh\u00f4ng c\u1ea7n bi\u1ebft, mi\u1ec5n l\u00e0 giao di\u1ec7n v\u1eabn gi\u1eef nguy\u00ean. S\u1ef1 t\u00e1ch bi\u1ec7t n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi kh\u1ea3 n\u0103ng b\u1ea3o tr\u00ec l\u00e2u d\u00e0i.<\/p>\n

      Nh\u1eefng kh\u00e1c bi\u1ec7t ch\u00ednh: So s\u00e1nh song song \ud83d\udcca<\/h2>\n

      \u0110\u1ec3 h\u00ecnh dung r\u00f5 qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i, h\u00e3y xem x\u00e9t c\u00e1ch c\u00e1c kh\u00e1i ni\u1ec7m c\u1ee5 th\u1ec3 \u0111\u01b0\u1ee3c x\u1eed l\u00fd trong t\u1eebng m\u00f4 h\u00ecnh.<\/p>\n\n\n\n\n\n\n\n\n\n
      Kh\u00e1i ni\u1ec7m<\/th>\nC\u00e1ch ti\u1ebfp c\u1eadn th\u1ee7 t\u1ee5c<\/th>\nC\u00e1ch ti\u1ebfp c\u1eadn h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng<\/th>\n<\/tr>\n<\/thead>\n
      L\u01b0u tr\u1eef d\u1eef li\u1ec7u<\/strong><\/td>\nBi\u1ebfn to\u00e0n c\u1ee5c ho\u1eb7c \u0111\u1ed1i s\u1ed1 \u0111\u01b0\u1ee3c truy\u1ec1n v\u00e0o<\/td>\nThu\u1ed9c t\u00ednh b\u00ean trong m\u1ed9t l\u1edbp<\/td>\n<\/tr>\n
      Logic<\/strong><\/td>\nC\u00e1c h\u00e0m thao t\u00e1c tr\u00ean d\u1eef li\u1ec7u<\/td>\nC\u00e1c ph\u01b0\u01a1ng th\u1ee9c thu\u1ed9c v\u1ec1 \u0111\u1ed1i t\u01b0\u1ee3ng<\/td>\n<\/tr>\n
      S\u1eeda \u0111\u1ed5i<\/strong><\/td>\nTruy c\u1eadp tr\u1ef1c ti\u1ebfp v\u00e0o b\u1ed9 nh\u1edb\/bi\u1ebfn<\/td>\nG\u1ecdi c\u00e1c ph\u01b0\u01a1ng th\u1ee9c c\u00f4ng khai (Getters\/Setters)<\/td>\n<\/tr>\n
      Kh\u1ea3 n\u0103ng t\u00e1i s\u1eed d\u1ee5ng<\/strong><\/td>\nSao ch\u00e9p-d\u00e1n c\u00e1c h\u00e0m ho\u1eb7c th\u01b0 vi\u1ec7n<\/td>\nK\u1ebf th\u1eeba v\u00e0 K\u1ebft h\u1ee3p<\/td>\n<\/tr>\n
      \u0110\u1ed9 ph\u1ee9c t\u1ea1p<\/strong><\/td>\nT\u0103ng theo s\u1ed1 l\u01b0\u1ee3ng h\u00e0m<\/td>\n\u0110\u01b0\u1ee3c qu\u1ea3n l\u00fd th\u00f4ng qua c\u00e1c l\u1edbp tr\u1eebu t\u01b0\u1ee3ng<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      B\u1ed1n tr\u1ee5 c\u1ed9t c\u1ee7a t\u01b0 duy \u0111\u1ed1i t\u01b0\u1ee3ng \ud83c\udfdb\ufe0f<\/h2>\n

      \u0110\u1ec3 chuy\u1ec3n \u0111\u1ed5i th\u00e0nh c\u00f4ng, b\u1ea1n ph\u1ea3i th\u1ea5m nhu\u1ea7n b\u1ed1n tr\u1ee5 c\u1ed9t c\u1ed1t l\u00f5i \u0111\u1ecbnh ngh\u0129a t\u01b0 duy h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng. Nh\u1eefng \u0111i\u1ec1u n\u00e0y kh\u00f4ng ch\u1ec9 l\u00e0 quy t\u1eafc l\u1eadp tr\u00ecnh; ch\u00fang l\u00e0 chi\u1ebfn l\u01b0\u1ee3c thi\u1ebft k\u1ebf.<\/p>\n

      1. Bao \u0111\u00f3ng \ud83d\udee1\ufe0f<\/h3>\n

      Bao \u0111\u00f3ng l\u00e0 vi\u1ec7c che gi\u1ea5u c\u00e1c chi ti\u1ebft tri\u1ec3n khai b\u00ean trong. Trong t\u01b0 duy th\u1ee7 t\u1ee5c, d\u1eef li\u1ec7u th\u01b0\u1eddng \u0111\u01b0\u1ee3c c\u00f4ng khai. Trong t\u01b0 duy \u0111\u1ed1i t\u01b0\u1ee3ng, d\u1eef li\u1ec7u l\u00e0 ri\u00eang t\u01b0, c\u00f2n h\u00e0nh vi l\u00e0 c\u00f4ng khai.<\/p>\n

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      • T\u1ea1i sao \u0111i\u1ec1u n\u00e0y quan tr\u1ecdng:<\/strong> N\u00f3 ng\u0103n c\u1ea3n m\u00e3 b\u00ean ngo\u00e0i l\u00e0m h\u1ecfng logic b\u00ean trong b\u1eb1ng c\u00e1ch thay \u0111\u1ed5i d\u1eef li\u1ec7u tr\u1ef1c ti\u1ebfp.<\/li>\n
      • C\u00e1ch suy ngh\u0129:<\/strong> H\u00e3y t\u1ef1 h\u1ecfi: ‘\u0110\u1ed1i t\u01b0\u1ee3ng n\u00e0y c\u1ea7n gi\u1eef b\u00ed m\u1eadt \u0111i\u1ec1u g\u00ec \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang?’ v\u00e0 ‘Th\u00f4ng tin n\u00e0o n\u00f3 ph\u1ea3i c\u00f4ng khai v\u1edbi th\u1ebf gi\u1edbi b\u00ean ngo\u00e0i?’<\/li>\n
      • L\u1ee3i \u00edch:<\/strong> Nh\u1eefng thay \u0111\u1ed5i trong logic b\u00ean trong kh\u00f4ng l\u00e0m h\u1ecfng c\u00e1c module ph\u1ee5 thu\u1ed9c.<\/li>\n<\/ul>\n

        2. Tr\u1eebu t\u01b0\u1ee3ng \ud83c\udfad<\/h3>\n

        Tr\u1eebu t\u01b0\u1ee3ng \u0111\u01a1n gi\u1ea3n h\u00f3a \u0111\u1ed9 ph\u1ee9c t\u1ea1p b\u1eb1ng c\u00e1ch t\u1eadp trung v\u00e0o c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m c\u1ed1t l\u00f5i v\u00e0 b\u1ecf qua c\u00e1c chi ti\u1ebft n\u1ec1n t\u1ea3ng. N\u00f3 cho ph\u00e9p b\u1ea1n m\u00f4 h\u00ecnh h\u00f3a m\u1ed9t kh\u00e1i ni\u1ec7m m\u00e0 kh\u00f4ng c\u1ea7n \u0111\u1ecbnh ngh\u0129a m\u1ecdi c\u00e1ch tri\u1ec3n khai c\u00f3 th\u1ec3.<\/p>\n

          \n
        • T\u1ea1i sao \u0111i\u1ec1u n\u00e0y quan tr\u1ecdng:<\/strong> N\u00f3 cho ph\u00e9p c\u00e1c ph\u1ea7n kh\u00e1c nhau c\u1ee7a h\u1ec7 th\u1ed1ng t\u01b0\u01a1ng t\u00e1c m\u00e0 kh\u00f4ng c\u1ea7n bi\u1ebft lo\u1ea1i c\u1ee5 th\u1ec3 c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng m\u00e0 ch\u00fang \u0111ang x\u1eed l\u00fd.<\/li>\n
        • C\u00e1ch suy ngh\u0129:<\/strong> X\u00e1c \u0111\u1ecbnh c\u00e1c giao di\u1ec7n ho\u1eb7c l\u1edbp tr\u1eebu t\u01b0\u1ee3ng \u0111\u1ea1i di\u1ec7n cho m\u1ed9t h\u1ee3p \u0111\u1ed3ng. H\u1ecfi: \u201c\u0110\u1eb7c t\u00ednh n\u00e0o m\u00e0 th\u1ef1c th\u1ec3 n\u00e0y cung c\u1ea5p?\u201d thay v\u00ec \u201cL\u00e0m th\u1ebf n\u00e0o n\u00f3 t\u00ednh to\u00e1n \u0111i\u1ec1u n\u00e0y?\u201d.<\/li>\n
        • L\u1ee3i \u00edch:<\/strong>Th\u00fac \u0111\u1ea9y t\u00ednh linh ho\u1ea1t v\u00e0 d\u1ec5 ki\u1ec3m th\u1eed th\u00f4ng qua c\u00e1c tri\u1ec3n khai gi\u1ea3 l\u1eadp.<\/li>\n<\/ul>\n

          3. K\u1ebf th\u1eeba \ud83c\udf33<\/h3>\n

          K\u1ebf th\u1eeba cho ph\u00e9p c\u00e1c l\u1edbp m\u1edbi \u0111\u01b0\u1ee3c t\u1ea1o ra t\u1eeb c\u00e1c l\u1edbp hi\u1ec7n c\u00f3, k\u1ebf th\u1eeba c\u00e1c thu\u1ed9c t\u00ednh v\u00e0 h\u00e0nh vi c\u1ee7a ch\u00fang. \u0110i\u1ec1u n\u00e0y m\u00f4 h\u00ecnh h\u00f3a m\u1ed1i quan h\u1ec7 \u201cl\u00e0 m\u1ed9t\u201d.<\/p>\n

            \n
          • T\u1ea1i sao \u0111i\u1ec1u \u0111\u00f3 quan tr\u1ecdng:<\/strong>N\u00f3 gi\u1ea3m thi\u1ec3u vi\u1ec7c tr\u00f9ng l\u1eb7p m\u00e3 v\u00e0 thi\u1ebft l\u1eadp m\u1ed9t c\u1ea5u tr\u00fac ph\u00e2n c\u1ea5p r\u00f5 r\u00e0ng.<\/li>\n
          • C\u00e1ch suy ngh\u0129:<\/strong>X\u00e1c \u0111\u1ecbnh c\u00e1c \u0111i\u1ec3m t\u01b0\u01a1ng \u0111\u1ed3ng gi\u1eefa c\u00e1c th\u1ef1c th\u1ec3. N\u1ebfu hai th\u1ef1c th\u1ec3 chia s\u1ebb c\u00e1c thu\u1ed9c t\u00ednh c\u1ed1t l\u00f5i gi\u1ed1ng nhau, h\u00e3y c\u00e2n nh\u1eafc t\u1ea1o m\u1ed9t l\u1edbp c\u01a1 s\u1edf.<\/li>\n
          • L\u1ee3i \u00edch:<\/strong>Ph\u00e1t tri\u1ec3n nhanh h\u01a1n v\u00e0 h\u00e0nh vi nh\u1ea5t qu\u00e1n gi\u1eefa c\u00e1c th\u1ef1c th\u1ec3 t\u01b0\u01a1ng t\u1ef1.<\/li>\n<\/ul>\n

            4. \u0110a h\u00ecnh \ud83c\udfa8<\/h3>\n

            \u0110a h\u00ecnh cho ph\u00e9p c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c x\u1eed l\u00fd nh\u01b0 th\u1ec3 ch\u00fang l\u00e0 th\u1ec3 hi\u1ec7n c\u1ee7a l\u1edbp cha thay v\u00ec l\u1edbp th\u1ef1c s\u1ef1 c\u1ee7a ch\u00fang. N\u00f3 cho ph\u00e9p c\u00f9ng m\u1ed9t giao di\u1ec7n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c d\u1ea1ng n\u1ec1n t\u1ea3ng kh\u00e1c nhau.<\/p>\n

              \n
            • T\u1ea1i sao \u0111i\u1ec1u \u0111\u00f3 quan tr\u1ecdng:<\/strong>N\u00f3 cho ph\u00e9p b\u1ea1n vi\u1ebft m\u00e3 ho\u1ea1t \u0111\u1ed9ng v\u1edbi c\u00e1c ki\u1ec3u t\u1ed5ng qu\u00e1t, gi\u00fap m\u00e3 d\u1ec5 th\u00edch nghi v\u1edbi c\u00e1c ki\u1ec3u m\u1edbi sau n\u00e0y.<\/li>\n
            • C\u00e1ch suy ngh\u0129:<\/strong>T\u1eadp trung v\u00e0o h\u00e0nh vi, ch\u1ee9 kh\u00f4ng ph\u1ea3i danh t\u00ednh c\u1ee5 th\u1ec3. H\u1ecfi: \u201c\u0110\u1ed1i t\u01b0\u1ee3ng n\u00e0y c\u00f3 th\u1ec3 ph\u1ea3n h\u1ed3i th\u00f4ng \u0111i\u1ec7p n\u00e0y kh\u00f4ng?\u201d.<\/li>\n
            • L\u1ee3i \u00edch:<\/strong>T\u00e1ch bi\u1ec7t ng\u01b0\u1eddi g\u1ecdi kh\u1ecfi tri\u1ec3n khai, h\u1ed7 tr\u1ee3 nguy\u00ean t\u1eafc m\u1edf\/\u0111\u00f3ng.<\/li>\n<\/ul>\n

              Chuy\u1ec3n \u0111\u1ed5i trong giai \u0111o\u1ea1n ph\u00e2n t\u00edch \ud83d\udd0d<\/h2>\n

              S\u1ef1 chuy\u1ec3n \u0111\u1ed5i b\u1eaft \u0111\u1ea7u tr\u01b0\u1edbc khi vi\u1ebft m\u00e3. N\u00f3 b\u1eaft \u0111\u1ea7u trong giai \u0111o\u1ea1n thu th\u1eadp v\u00e0 ph\u00e2n t\u00edch y\u00eau c\u1ea7u. Trong ph\u00e2n t\u00edch theo h\u01b0\u1edbng th\u1ee7 t\u1ee5c, b\u1ea1n c\u00f3 th\u1ec3 li\u1ec7t k\u00ea c\u00e1c h\u00e0m c\u1ea7n thi\u1ebft \u0111\u1ec3 x\u1eed l\u00fd m\u1ed9t \u0111\u01a1n h\u00e0ng. Trong OOAD, b\u1ea1n x\u00e1c \u0111\u1ecbnh c\u00e1c th\u1ef1c th\u1ec3 tham gia v\u00e0o m\u1ed9t \u0111\u01a1n h\u00e0ng.<\/p>\n

              C\u00e1c b\u01b0\u1edbc ph\u00e2n t\u00edch<\/h3>\n
                \n
              • X\u00e1c \u0111\u1ecbnh Ng\u01b0\u1eddi tham gia v\u00e0 \u0110\u1ed1i t\u01b0\u1ee3ng:<\/strong>Ai ho\u1eb7c c\u00e1i g\u00ec t\u01b0\u01a1ng t\u00e1c v\u1edbi h\u1ec7 th\u1ed1ng? X\u00e1c \u0111\u1ecbnh c\u00e1c danh t\u1eeb trong v\u0103n b\u1ea3n y\u00eau c\u1ea7u.<\/li>\n
              • X\u00e1c \u0111\u1ecbnh Tr\u00e1ch nhi\u1ec7m:<\/strong>M\u1ed7i \u0111\u1ed1i t\u01b0\u1ee3ng bi\u1ebft \u0111i\u1ec1u g\u00ec? M\u1ed7i \u0111\u1ed1i t\u01b0\u1ee3ng l\u00e0m g\u00ec?<\/li>\n
              • X\u00e1c \u0111\u1ecbnh M\u1ed1i quan h\u1ec7:<\/strong>C\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng t\u01b0\u01a1ng t\u00e1c v\u1edbi nhau nh\u01b0 th\u1ebf n\u00e0o? \u0110\u00f3 l\u00e0 m\u1ed1i quan h\u1ec7 \u201cc\u00f3-m\u1ed9t\u201d (th\u00e0nh ph\u1ea7n) hay \u201cl\u00e0-m\u1ed9t\u201d (k\u1ebf th\u1eeba)?<\/li>\n
              • M\u00f4 h\u00ecnh h\u00f3a Chuy\u1ec3n tr\u1ea1ng th\u00e1i:<\/strong>M\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i theo th\u1eddi gian nh\u01b0 th\u1ebf n\u00e0o? V\u1ebd s\u01a1 \u0111\u1ed3 c\u00e1c chuy\u1ec3n ti\u1ebfp h\u1ee3p l\u1ec7.<\/li>\n<\/ul>\n

                B\u1eb1ng c\u00e1ch t\u1eadp trung v\u00e0o c\u00e1c danh t\u1eeb v\u00e0 \u0111\u1ed9ng t\u1eeb trong l\u0129nh v\u1ef1c v\u1ea5n \u0111\u1ec1, b\u1ea1n s\u1ebd t\u1ef1 nhi\u00ean chuy\u1ec3n h\u01b0\u1edbng sang m\u00f4 h\u00ecnh h\u00f3a \u0111\u1ed1i t\u01b0\u1ee3ng. C\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y \u0111\u1ea3m b\u1ea3o ph\u1ea7n m\u1ec1m ph\u1ea3n \u00e1nh \u0111\u00fang logic th\u1ebf gi\u1edbi th\u1ef1c m\u00e0 n\u00f3 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 h\u1ed7 tr\u1ee3.<\/p>\n

                Chuy\u1ec3n \u0111\u1ed5i trong giai \u0111o\u1ea1n thi\u1ebft k\u1ebf \ud83d\udee0\ufe0f<\/h2>\n

                Sau khi ph\u00e2n t\u00edch ho\u00e0n t\u1ea5t, giai \u0111o\u1ea1n thi\u1ebft k\u1ebf chuy\u1ec3n \u0111\u1ed5i c\u00e1c kh\u00e1i ni\u1ec7m th\u00e0nh b\u1ea3n v\u1ebd c\u1ea5u tr\u00fac. \u0110\u00e2y l\u00e0 l\u00fac t\u00ednh \u0111\u00f3ng g\u00f3i v\u00e0 thi\u1ebft k\u1ebf giao di\u1ec7n tr\u1edf n\u00ean quan tr\u1ecdng.<\/p>\n

                C\u00e1c nguy\u00ean t\u1eafc thi\u1ebft k\u1ebf c\u1ea7n \u00e1p d\u1ee5ng<\/h3>\n
                  \n
                • Nguy\u00ean t\u1eafc tr\u00e1ch nhi\u1ec7m \u0111\u01a1n nh\u1ea5t:<\/strong> \u0110\u1ea3m b\u1ea3o m\u1ed7i l\u1edbp ch\u1ec9 c\u00f3 m\u1ed9t l\u00fd do \u0111\u1ec3 thay \u0111\u1ed5i. N\u1ebfu m\u1ed9t l\u1edbp x\u1eed l\u00fd c\u1ea3 l\u01b0u tr\u1eef d\u1eef li\u1ec7u v\u00e0 x\u00e1c th\u1ef1c d\u1eef li\u1ec7u, h\u00e3y t\u00e1ch n\u00f3 ra.<\/li>\n
                • \u0110\u1ea3o ng\u01b0\u1ee3c ph\u1ee5 thu\u1ed9c:<\/strong> Ph\u1ee5 thu\u1ed9c v\u00e0o tr\u1eebu t\u01b0\u1ee3ng, kh\u00f4ng ph\u1ea3i c\u1ee5 th\u1ec3. C\u00e1c module c\u1ea5p cao kh\u00f4ng n\u00ean ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c module c\u1ea5p th\u1ea5p.<\/li>\n
                • Nguy\u00ean t\u1eafc M\u1edf\/\u0110\u00f3ng:<\/strong> C\u00e1c l\u1edbp n\u00ean \u0111\u01b0\u1ee3c m\u1edf r\u1ed9ng nh\u01b0ng \u0111\u00f3ng \u0111\u1ed1i v\u1edbi thay \u0111\u1ed5i. S\u1eed d\u1ee5ng \u0111a h\u00ecnh \u0111\u1ec3 th\u00eam t\u00ednh n\u0103ng m\u1edbi.<\/li>\n
                • T\u00ednh li\u00ean k\u1ebft th\u1ea5p:<\/strong> T\u1ed1i thi\u1ec3u h\u00f3a c\u00e1c k\u1ebft n\u1ed1i gi\u1eefa c\u00e1c l\u1edbp. Li\u00ean k\u1ebft cao khi\u1ebfn h\u1ec7 th\u1ed1ng tr\u1edf n\u00ean mong manh.<\/li>\n
                • T\u00ednh g\u1eafn k\u1ebft cao:<\/strong> Gi\u1eef c\u00e1c ch\u1ee9c n\u0103ng li\u00ean quan l\u1ea1i v\u1edbi nhau trong m\u1ed9t l\u1edbp.<\/li>\n<\/ul>\n

                  Khi thi\u1ebft k\u1ebf, tr\u00e1nh t\u1ea1o ra c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng ‘Th\u01b0\u1ee3ng \u0110\u1ebf’ l\u00e0m qu\u00e1 nhi\u1ec1u vi\u1ec7c. Chia nh\u1ecf logic ph\u1ee9c t\u1ea1p th\u00e0nh c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng nh\u1ecf, t\u1eadp trung h\u01a1n. \u0110i\u1ec1u n\u00e0y gi\u00fap h\u1ec7 th\u1ed1ng d\u1ec5 suy lu\u1eadn v\u00e0 ki\u1ec3m th\u1eed h\u01a1n.<\/p>\n

                  Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn trong qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i \ud83d\udea7<\/h2>\n

                  Nhi\u1ec1u nh\u00e0 ph\u00e1t tri\u1ec3n g\u1eb7p kh\u00f3 kh\u0103n trong qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i n\u00e0y. H\u1ecd c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng logic th\u1ee7 t\u1ee5c b\u00ean trong c\u1ea5u tr\u00fac \u0111\u1ed1i t\u01b0\u1ee3ng, d\u1eabn \u0111\u1ebfn c\u00e1c m\u1eabu ch\u1ed1ng l\u1ea1i (anti-patterns) nh\u01b0 ‘Active Record’ ho\u1eb7c ‘M\u00f4 h\u00ecnh mi\u1ec1n tr\u1ed1ng r\u1ed7ng’.<\/p>\n

                    \n
                  • M\u00f4 h\u00ecnh mi\u1ec1n tr\u1ed1ng r\u1ed7ng:<\/strong> T\u1ea1o ra c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng ch\u1ec9 l\u01b0u tr\u1eef d\u1eef li\u1ec7u (getters\/setters) m\u00e0 kh\u00f4ng c\u00f3 h\u00e0nh vi. \u0110i\u1ec1u n\u00e0y quay tr\u1edf l\u1ea1i t\u01b0 duy th\u1ee7 t\u1ee5c.<\/li>\n
                  • Thi\u1ebft k\u1ebf qu\u00e1 m\u1ee9c:<\/strong> T\u1ea1o c\u00e2y k\u1ebf th\u1eeba ph\u1ee9c t\u1ea1p cho nh\u1eefng v\u1ea5n \u0111\u1ec1 \u0111\u01a1n gi\u1ea3n. Gi\u1eef k\u1ebf th\u1eeba n\u00f4ng v\u00e0 k\u1ebft h\u1ee3p s\u00e2u.<\/li>\n
                  • Tr\u1ea1ng th\u00e1i to\u00e0n c\u1ee5c:<\/strong> D\u1ef1a v\u00e0o c\u00e1c ph\u01b0\u01a1ng th\u1ee9c t\u0129nh ho\u1eb7c bi\u1ebfn to\u00e0n c\u1ee5c \u0111\u1ec3 chia s\u1ebb d\u1eef li\u1ec7u. \u0110i\u1ec1u n\u00e0y ph\u00e1 v\u1ee1 t\u00ednh \u0111\u00f3ng g\u00f3i.<\/li>\n
                  • \u00d4 nhi\u1ec5m giao di\u1ec7n:<\/strong> T\u1ea1o ra c\u00e1c giao di\u1ec7n qu\u00e1 r\u1ed9ng. C\u00e1c giao di\u1ec7n n\u00ean c\u1ee5 th\u1ec3 theo nhu c\u1ea7u c\u1ee7a kh\u00e1ch h\u00e0ng.<\/li>\n<\/ul>\n

                    \u0110\u1ec3 tr\u00e1nh nh\u1eefng b\u1eaby n\u00e0y, h\u00e3y li\u00ean t\u1ee5c \u0111\u1eb7t c\u00e2u h\u1ecfi v\u1ec1 thi\u1ebft k\u1ebf c\u1ee7a b\u1ea1n. N\u1ebfu b\u1ea1n nh\u1eadn th\u1ea5y m\u00ecnh \u0111ang truy\u1ec1n d\u1eef li\u1ec7u \u0111i l\u1ea1i \u0111\u1ec3 m\u1ed9t h\u00e0m trung t\u00e2m thay \u0111\u1ed5i, h\u00e3y d\u1eebng l\u1ea1i. H\u1ecfi xem li\u1ec7u d\u1eef li\u1ec7u \u0111\u00f3 c\u00f3 n\u00ean thu\u1ed9c v\u1ec1 m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng c\u1ee5 th\u1ec3 thay v\u00ec kh\u00f4ng.<\/p>\n

                    L\u1ee3i \u00edch c\u1ee7a t\u01b0 duy h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng \ud83d\udcc8<\/h2>\n

                    \u00c1p d\u1ee5ng t\u01b0 duy n\u00e0y mang l\u1ea1i l\u1ee3i \u00edch \u0111\u00e1ng k\u1ec3 v\u1ec1 d\u00e0i h\u1ea1n cho ki\u1ebfn tr\u00fac ph\u1ea7n m\u1ec1m.<\/p>\n

                      \n
                    • D\u1ec5 b\u1ea3o tr\u00ec:<\/strong> C\u00e1c thay \u0111\u1ed5i \u0111\u01b0\u1ee3c gi\u1edbi h\u1ea1n \u1edf m\u1ed9t khu v\u1ef1c. S\u1eeda l\u1ed7i trong m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng hi\u1ebfm khi l\u00e0m h\u1ecfng c\u00e1c ph\u1ea7n kh\u00f4ng li\u00ean quan c\u1ee7a h\u1ec7 th\u1ed1ng.<\/li>\n
                    • Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng:<\/strong>Vi\u1ec7c th\u00eam c\u00e1c t\u00ednh n\u0103ng m\u1edbi th\u01b0\u1eddng \u0111\u00f2i h\u1ecfi vi\u1ec7c th\u00eam c\u00e1c l\u1edbp m\u1edbi thay v\u00ec s\u1eeda \u0111\u1ed5i m\u00e3 ngu\u1ed3n hi\u1ec7n c\u00f3.<\/li>\n
                    • H\u1ee3p t\u00e1c:<\/strong>C\u00e1c nh\u00f3m c\u00f3 th\u1ec3 l\u00e0m vi\u1ec7c tr\u00ean c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00e1c nhau \u0111\u1ed3ng th\u1eddi m\u00e0 kh\u00f4ng xung \u0111\u1ed9t v\u1ec1 tr\u1ea1ng th\u00e1i to\u00e0n c\u1ee5c chung.<\/li>\n
                    • Kh\u1ea3 n\u0103ng t\u00e1i s\u1eed d\u1ee5ng:<\/strong>C\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf t\u1ed1t c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c b\u1ed1i c\u1ea3nh kh\u00e1c nhau v\u1edbi \u00edt \u0111i\u1ec1u ch\u1ec9nh nh\u1ea5t.<\/li>\n<\/ul>\n

                      B\u00e0i t\u1eadp th\u1ef1c h\u00e0nh cho s\u1ef1 thay \u0111\u1ed5i t\u01b0 duy \ud83c\udfcb\ufe0f<\/h2>\n

                      \u0110\u1ec3 c\u1ee7ng c\u1ed1 qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i n\u00e0y, h\u00e3y luy\u1ec7n t\u1eadp m\u00f4 h\u00ecnh h\u00f3a c\u00e1c v\u1ea5n \u0111\u1ec1 m\u00e0 kh\u00f4ng c\u1ea7n suy ngh\u0129 \u0111\u1ebfn chi ti\u1ebft tri\u1ec3n khai.<\/p>\n

                        \n
                      • H\u01b0\u1edbng d\u1eabn t\u1eebng b\u01b0\u1edbc:<\/strong>M\u00f4 t\u1ea3 m\u1ed9t quy tr\u00ecnh ch\u1ec9 b\u1eb1ng c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng v\u00e0 h\u00e0nh \u0111\u1ed9ng c\u1ee7a ch\u00fang. Tr\u00e1nh d\u00f9ng c\u00e1c t\u1eeb nh\u01b0 \u201cv\u00f2ng l\u1eb7p\u201d, \u201cn\u1ebfu\u201d, ho\u1eb7c \u201ch\u00e0m\u201d.<\/li>\n
                      • V\u1ebd s\u01a1 \u0111\u1ed3:<\/strong>V\u1ebd s\u01a1 \u0111\u1ed3 l\u1edbp tr\u01b0\u1edbc khi vi\u1ebft m\u00e3. T\u1eadp trung v\u00e0o thu\u1ed9c t\u00ednh v\u00e0 ph\u01b0\u01a1ng th\u1ee9c.<\/li>\n
                      • T\u00e1i c\u1ea5u tr\u00fac:<\/strong>L\u1ea5y m\u00e3 th\u1ee7 t\u1ee5c hi\u1ec7n c\u00f3 v\u00e0 c\u1ed1 g\u1eafng x\u00e1c \u0111\u1ecbnh c\u00e1c ranh gi\u1edbi t\u1ef1 nhi\u00ean n\u01a1i c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng n\u00ean \u0111\u01b0\u1ee3c t\u1ea1o ra.<\/li>\n
                      • Thi\u1ebft k\u1ebf h\u01b0\u1edbng mi\u1ec1n:<\/strong>Nghi\u00ean c\u1ee9u c\u00e1ch mi\u1ec1n kinh doanh \u0111\u01b0\u1ee3c \u00e1nh x\u1ea1 v\u00e0o c\u1ea5u tr\u00fac m\u00e3 ngu\u1ed3n c\u1ee7a b\u1ea1n. \u0110\u1ed3ng b\u1ed9 h\u00f3a c\u00e1c thu\u1eadt ng\u1eef k\u1ef9 thu\u1eadt v\u1edbi thu\u1eadt ng\u1eef kinh doanh.<\/li>\n<\/ul>\n

                        Suy ngh\u0129 cu\u1ed1i c\u00f9ng v\u1ec1 s\u1ef1 ti\u1ebfn h\u00f3a ki\u1ebfn tr\u00fac \ud83c\udf1f<\/h2>\n

                        Chuy\u1ec3n t\u1eeb t\u01b0 duy th\u1ee7 t\u1ee5c sang t\u01b0 duy h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng l\u00e0 m\u1ed9t h\u00e0nh tr\u00ecnh h\u1ecdc t\u1eadp li\u00ean t\u1ee5c. N\u00f3 \u0111\u00f2i h\u1ecfi ph\u1ea3i t\u1eeb b\u1ecf s\u1ef1 tho\u1ea3i m\u00e1i c\u1ee7a vi\u1ec7c th\u1ef1c thi tuy\u1ebfn t\u00ednh v\u00e0 ch\u1ea5p nh\u1eadn s\u1ef1 ph\u1ee9c t\u1ea1p c\u1ee7a c\u00e1c th\u1ef1c th\u1ec3 t\u01b0\u01a1ng t\u00e1c v\u1edbi nhau. M\u1ee5c ti\u00eau kh\u00f4ng ph\u1ea3i l\u00e0 t\u1eeb b\u1ecf logic hay c\u1ea5u tr\u00fac, m\u00e0 l\u00e0 t\u1ed5 ch\u1ee9c ch\u00fang theo c\u00e1ch ph\u1ea3n \u00e1nh \u0111\u00fang th\u1ef1c t\u1ebf c\u1ee7a h\u1ec7 th\u1ed1ng \u0111ang \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng.<\/p>\n

                        B\u1eb1ng c\u00e1ch t\u1eadp trung v\u00e0o \u0111\u00f3ng g\u00f3i, tr\u1eebu t\u01b0\u1ee3ng, k\u1ebf th\u1eeba v\u00e0 \u0111a h\u00ecnh, b\u1ea1n s\u1ebd t\u1ea1o ra c\u00e1c h\u1ec7 th\u1ed1ng c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng l\u1ea1i s\u1ef1 thay \u0111\u1ed5i. \u0110\u1ea7u t\u01b0 ban \u0111\u1ea7u v\u00e0o vi\u1ec7c h\u1ecdc c\u00e1c kh\u00e1i ni\u1ec7m n\u00e0y s\u1ebd mang l\u1ea1i l\u1ee3i \u00edch r\u00f5 r\u1ec7t trong vi\u1ec7c gi\u1ea3m n\u1ee3 k\u1ef9 thu\u1eadt v\u00e0 t\u0103ng t\u00ednh linh ho\u1ea1t. Khi b\u1ea1n ho\u00e0n thi\u1ec7n k\u1ef9 n\u0103ng ph\u00e2n t\u00edch v\u00e0 thi\u1ebft k\u1ebf h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng, b\u1ea1n s\u1ebd nh\u1eadn th\u1ea5y m\u00e3 ngu\u1ed3n tr\u1edf n\u00ean tr\u1ef1c quan h\u01a1n v\u00e0 ki\u1ebfn tr\u00fac tr\u1edf n\u00ean v\u1eefng ch\u1eafc h\u01a1n. N\u1ec1n t\u1ea3ng n\u00e0y h\u1ed7 tr\u1ee3 vi\u1ec7c t\u1ea1o ra ph\u1ea7n m\u1ec1m c\u00f3 th\u1ec3 v\u01b0\u1ee3t qua th\u1eed th\u00e1ch c\u1ee7a th\u1eddi gian v\u00e0 nh\u1eefng y\u00eau c\u1ea7u thay \u0111\u1ed5i.<\/p>\n","protected":false},"excerpt":{"rendered":"

                        Chuy\u1ec3n \u0111\u1ed5i t\u1eeb t\u01b0 duy th\u1ee7 t\u1ee5c sang t\u01b0 duy h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 h\u1ecdc c\u00fa ph\u00e1p m\u1edbi. N\u00f3 \u0111\u1ea1i di\u1ec7n cho m\u1ed9t s\u1ef1 thay \u0111\u1ed5i…<\/p>\n","protected":false},"author":1,"featured_media":1845,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"Chuy\u1ec3n \u0111\u1ed5i t\u1eeb t\u01b0 duy th\u1ee7 t\u1ee5c sang t\u01b0 duy h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng \ud83e\udde0","_yoast_wpseo_metadesc":"H\u1ecdc c\u00e1ch thay \u0111\u1ed5i t\u01b0 duy c\u1ee7a b\u1ea1n t\u1eeb ph\u00e2n t\u00edch v\u00e0 thi\u1ebft k\u1ebf th\u1ee7 t\u1ee5c sang h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng. 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