kiem' thang co' toc' do loi la dieu hien nhien roi` . co' loi` la mung` roi` vi dc boi thuong` . con` thang ngheo` pha' san cung ko du . chuyen nay de hieu qua' . dieu tra noi cho vui co' tinh' cong bang` chu' that ra la` muon' boeing boi thuong the' thoi .