Vietcombank sold the dollar at VND23,930 Tuesday, up 0.13% from Monday.
The rate at Eximbank remained at VND23,980. Techcombank also kept its rate unchanged at VND24,010.
The State Bank of Vietnam raised its reference rate up 0.01% to VND23,643.
The dollar was stable on the black market at VND23,830.
The dollar has gained over the dong by 0.84% since the beginning of the year.
Globally the dollar was parked below recent peaks on Tuesday, as a three-week rally faded and traders waited on economic data to figure on whether it's warranted to push the dollar up any further, Reuters reported.
After a quiet Monday thanks to the President's Day holiday in the United States, the dollar stood steady at 132.24 yen and $1.0687 per euro , with the common currency finding strong support above $1.06.
The U.S. dollar index has climbed three weeks in a row for a gain of about 1.7% through February so far, but has steadied at 103.86, down from a six-week high of 104.67 hit on Friday.
"Friday's inability of euro/dollar to push lower after breaking below $1.0650 rather sums up the FX market for me," said Societe Generale strategist Kit Juckes.