TRAN QUANG HAI sings a Vietnamese folksong CÒ LẢ with overtones in one breath 52 seconds 05.04.2018 by Hai Tran Quang TRAN QUANG HAI sings a Vietnamese folksong CÒ LẢ with overtones in one breath 52 seconds QuangHai Tran Published on Mar 11, 2017 TRAN QUANG HAI sings a Vietnamese folksong CÒ LẢ with overtones in one breath 52 seconds Miami, USA , March 11th, 2017