I found this survey and it says
SALARY SURVEYS 1,183
UPDATED November 2024
AVERAGE SALARY / YEAR MOST TYPICAL SALARY / YEAR
459,294,500 VND 172,112,500 VND
$18,680 USD $7,000 USD
(24587.5 VND = 1 USD)
…and I can’t believe that ALL Vietnamese are “multimillionaires” in VND