he dinh kien' gi` dau . Hom truoc' vo nghe thi` cha? thay' no' chay. source len xem thi` thay' link http://www.nghenhac.info/pmmusic.asp...671&iCode= nen ket' luan. ho*i voi. vang` ma` thuc. ra cung~ chi? co' 2 bai` chay. ngon thoi ma` may' bai` kia chi chay. be' dung` hieu? lam` nhe'.......