Duc Huy opened the scoreboard for Vietnam in the 18th minute of the first half and one minute later, Trong Luan raised the score to 2-0.
Bahrain team leader, Radhi Alsandi scored one for his team in the 29th minute.
With the victory, Vietnam secured the second place of the Group A with three points.
In the first match, the team lost to Malaysia 1-2.
The team is scheduled to face the host Taipei team (China) at 18:00 on February 5, while Bahrain will compete with Malaysia at the same time.