Hien, from Quang Ninh Province, grabbed 7.5 points and came in second in the standard chess event.
Thai Ngoc Tuong Minh of Dong Nai won a gold medal with 8.5 points.
Earlier, Hien claimed a bronze medal in rapid chess and finished sixth in the blitz event.
In other standard categories, Vuong Trung Hieu topped the boys’ U20; Nguyen Hoang Anh won the girls’ U20; Phung Thi Quynh Trang triumphed in the girls’ U17, and Le Minh Hoang claimed the boys’ U17.
