Unofficial exchange points sold the dollar at VND23,450 Monday morning, down 0.13% from Sunday.
Vietcombank maintained the dollar at VND23,620, having kept it there since Wednesday.
Eximbank kept the greenback stable at VND23,600.
Techcombank lowered it by 0.02% to VND23,621.
The State Bank of Vietnam reference rate remained at VND23,600.
The dollar has fallen against the dong by 0.46% since the beginning of the year.
Globally the dollar strengthened against the yen because of the continued strong growth in the U.S. labour market despite inflation and sharp interest rate rises, Reuters reported.
The yen slipped 0.3% against the U.S. dollar to 132.47, extending a similar-sized decline from Friday, when data showed the U.S. economy continued to add jobs at a brisk pace in March.
Meanwhile, the New Zealand dollar slumped 0.6% to $0.6238, and the Aussie slipped 0.21% to $0.6660.