The duo lost to Warisara Dansoonthornwong and Sarunrak Vitidsarn of Thailand 21-11 21-11 in the final.
Earlier, in the boys’ singles U19, Vietnamese No 10 seed Nguyen Hai Dang was knocked out in the third round. On the girls’ side, Tran Thi Hoang Tam and Vu Thi Anh Thu were ousted in the second round.
Thu was expected to shine as she ranked in the top 16 female badminton players at the 2017 BWF World Junior Championships in Indonesia in October.
Vietnam sent 18 players to the tournament, competing in age groups from U13-19.