Unofficial exchange points sold the greenback 0.08% lower at VND25,750.
Vietcombank kept its rate steady at VND25,670.
The State Bank of Vietnam also maintained its reference rate at VND24,646.
The dollar has gained over the dong by 0.78% since the beginning of this year.
Globally the dollar rose after falling to its lowest in more than two months at the start of the week, buoyed by safe-haven flows after U.S. President Donald Trump said tariffs on Mexico and Canada would proceed as planned, Reuters reported.
The stronger dollar in turn left the euro off a one-month high at $1.0461, with future gains in the single currency likely to hinge on how soon a coalition government can be formed in Germany following the election victory of the country's conservatives.
"Since the last week or two, the incoming economic news from the U.S. is really playing to this narrative that the U.S. is kind of losing its economic exceptionalism," said Ray Attrill, head of FX strategy at National Australia Bank.
"But whenever we see a reasonable risk-off tone in equity markets ... the dollar gets its sort of traditional safe-haven support."
Elsewhere, the dollar rose 0.35% against the yen to 150.22, recovering from a fall to its weakest level since early December against the Japanese currency on Monday.