Nh\u1eefng n\u1ed9i dung quan tr\u1ecdng nh\u1ea5t trong Ng\u01b0\u1eddi l\u00e1i \u0111\u00f2 s\u00f4ng \u0110\u00e0 (Ph\u1ea7n 1)<\/a><\/blockquote><\/iframe>