Vietcombank sold the dollar at VND24,750, up 0.10% from Wednesday.
The State Bank of Vietnam lowerded its reference rate by 0.10% to VND24,187.
The dollar went up on the black market by 0.32% to VND25,240.
It has risen against the dong by 1.27% since the beginning of the year.
Globally the dollar traded near a four-week high versus the euro on Thursday after signs of some stickiness in U.S. inflation reinforced expectations that the Federal Reserve would avoid a super-sized interest rate cut next week. Reuters reported.
The euro was flat at $1.1009, sticking close to Wednesday's low of $1.1002, the weakest since Aug. 16.
The dollar gained against the yen, following a turbulent session on Wednesday that saw the U.S. currency plunge as much as 1.24% to the lowest this year before recovering all its losses after the consumer price data.
Sterling edged lower to $1.3038, after dipping as far as $1.30025 in the previous session for the first time since Aug. 20.