Vietcombank sold the dollar 0.04% higher at VND26,170. On the black market the greenback declined 0.19% to VND25,950.
Globally the dollar hovered near a two-month high on Tuesday as volatile oil prices and a rapid climb in Treasury yields lent support, although gains were limited as traders awaited US data this week for clues on the Federal Reserve's rate path, Reuters reported.
The euro traded near its weakest level in three months at $1.1367 after the European Central Bank's chief signaled measured steps to quell inflation. Sterling was steady at $1.3248, also not far from a three-month trough.
The dollar index, which measures the US currency against a basket of peers, was a touch higher at 101.2 and on track for a 1.8% advance this month, its best performance since June.