The Vietnamese swimmers also took 27 golds, 25 silvers, and 16 bronzes to take the second position in the medal tally.
Nguyen Thuy Hien and Duong Van Hoang Quy broke two records at the tournament.
Meanwhile, the Vietnamese diving team also finished the competition in second place with 5 golds, 8 silvers, and 7 bronzes.
The championships, which will last till December 8, features 10 teams with Thailand having the highest number of 111 swimmers. Vietnam sent 34 competitors participating in all categories.
According to the coaching board, the tournament is a test for athletes to prepare for the international events, including the 33rd SEA Games also in Thailand in 2025.
TH