Vietcombank sold the dollar at VND24,970 Thursday, up 0.08% from Wednesday.
The State Bank of Vietnam’s reference rate went up 0.02% to VND24,003.
The dollar was sold at VND25,495 on the black market, down 0.33%.
It has increased against the dong by 2.25% since the beginning of the year.
The U.S. dollar received a boost against major currency peers on Thursday, as a Federal Reserve official said he wasn't in a hurry to cut rates amid sticky inflation, and as traders braced for key economic data, Reuters reported.
The greenback reached 151.975 yen on Wednesday, its strongest against the yen since mid-1990.
The yen gained a little after Japanese authorities held a meeting on Wednesday on the currency's weakness, and top currency diplomat Masato Kanda said he "won't rule out any steps to respond to disorderly FX moves."