Vietcombank sold the dollar at VND23,855 Friday, up 0.06% from Thursday.
Eximbank raised its rates by 0.08% to VND23,840. Techcombank sold the dollar VND23,862, up 0.1%.
The State Bank of Vietnam increased its reference rate 0.03% to VND23,744.
The USD/VND exchange rate has climbed by 0.53% since the beginning of the year.
The greenback was kept stable at VND23,700 on the black market.
Globally, the dollar strengthened against the euro on Thursday, after better-than-expected U.S. economic data continue to foil investors' expectation for relatively dovish monetary policy from the Federal Reserve.
A recent string of strong data show that, for now, the U.S. is staving off a recession, increasing the likelihood that the Fed could further hike interest rates if it continues to see strong economic numbers across the board.
The dollar index , which measures the currency against six major peers, rose 0.692% to 101.790, while the euro is down 1.06% to $1.0965.