Th\u00ed sinh kh\u00f4ng \u0111\u01b0\u1ee3c thay \u0111\u1ed5i c\u1ee5m thi v\u00e0 m\u00f4n thi \u0111\u00e3 \u0111\u0103ng k\u00fd<\/a><\/blockquote><\/iframe>