2. Thay \u0111\u1ed5i h\u00ecnh d\u1ea1ng \u1edf \u0111i\u1ec3m \u0111\u1ea7u v\u00e0 \u0111i\u1ec3m cu\u1ed1i<\/strong><\/p>\n\n\n\nM\u1ed9t c\u00e1ch tinh t\u1ebf kh\u00e1c \u0111\u1ec3 s\u1eeda l\u1ea1i m\u1ed9t ki\u1ec3u ch\u1eef l\u00e0 s\u1eeda \u0111\u1ed5i h\u00ecnh d\u1ea1ng c\u1ee7a c\u00e1c ph\u1ea7n \u0111\u1ea7u v\u00e0 cu\u1ed1i.<\/p>\n\n\n\n
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