How to make a Vietnamese Trzáng (Đàn Môi), VIETNAM, (11.2014) 02.03.2018 by Hai Tran Quang How to make a Vietnamese Trzáng (Đàn Môi), VIETNAM, (11.2014) Đặng Nguyên Published on Dec 16, 2014 Trzang_Đàn Môi (jew’s harp for H’mong ethnic) Artisan: Hoàng A Giáo Bản Mế, Si Ma Cai, Lào Cai, Việt Nam. November 7th 2014.