Vietcombank sold the greenback 0.04% lower at VND25,525.
The State Bank of Vietnam lowered its reference rate by 0.04% to VND24,310.
Unofficial exchange points sold the dollar 0.21% lower at VND25,785.
Globally the dollar the dollar was perched near a two-year high against a basket of currencies at 108.15, and was on track for a monthly gain of more than 2%, Reuters reported.
The Australian and New Zealand dollars were meanwhile among the biggest losers against a dominant greenback on Thursday, with the Aussie falling 0.45% to $0.6241. The kiwi slid 0.51% to $0.5650.
The euro eased 0.18% to $1.0398, while the yen languished near a five-month low and last stood at 157.45 per dollar.