Vietcombank sold the dollar at VND23,670, down 0.08% from Tuesday.
The rate at Techcombank was at VND23,695, down 0.02%.
Eximbank sold the greenback 0.08% higher at VND23,680.
The State Bank of Vietnam set its reference rate at VND23,603, down 0.01%.
Most unofficial exchange points maintained the rate at VND23,800, same as Tuesday.
The U.S. dollar index rose 1% on Tuesday to 104.73, mostly due to the euro's drop, and it eased a little on Wednesday to 104.47, Reuters reported.
Headline German CPI fell to an annual 8.6% in December, from 10% the previous month, against expectations for 9.1%, data on Tuesday showed, knocking the euro and rallying bunds.
The euro had lost 1% overnight, its sharpest drop in more than two months, following a larger-than-expected drop in German inflation, but it edged up from three-week lows to $1.0566 in Asia trade.