B\u00e0i 10: Ph\u00e1p lu\u1eadt v\u1edbi h\u00f2a b\u00ecnh v\u00e0 s\u1ef1 ph\u00e1t tri\u1ec3n ti\u1ebfn b\u1ed9 c\u1ee7a nh\u00e2n lo\u1ea1i<\/a><\/blockquote><\/iframe>