Khai Nguyên sings with overtones, January 1st 2016, HCM city, VIETNAM Khai Nguyên sings with overtones, January 1st 2016, HCM city, VIETNAM QuangHai Tran Published on Jan 17, 2016 DANG VAN KHAI NGUYEN sings with overtones, January 1st 2016 in HO CHI MINH city, VIETNAM filmed by TRAN QUANG HAI Share this:TwitterFacebookLike this:Like Loading... Related Author: tranquanghai1944 Ethnomusicologist, composer and vietnamese traditional musician View all posts by tranquanghai1944