Vietcombank sold the dollar at VND23,610 Thursday, down 0.06% from Wednesday.
Techcombank lowered its rate by 0.14% to VND23,590.
Eximbank maintained the greenback at VND23,600.
The State Bank of Vietnam (SBV)’s reference rate is at VND23,672, up 0.07%.
The dollar fell 0.09% to VND23,450 on the black market.
It has declined by 0.51% against the dong since the beginning of the year.
Globally the U.S. dollar held near a seven-week peak on Thursday, after President Joe Biden and top U.S. congressional Republican Kevin McCarthy worked towards avoiding a damaging debt default, while the Aussie dollar slipped after disappointing jobs data.
Biden and McCarthy on Wednesday underscored their determination to strike a deal soon to raise the government's $31.4 trillion debt ceiling, having agreed a day earlier to negotiate directly after a months-long standoff.
The euro was pressured near an over six-week low at $1.0841. The single currency had bottomed at $1.08105 on Wednesday, its lowest since April 3.
The Japanese yen last bought 137.50 per dollar, having fallen nearly 1% on Wednesday.
"The dollar typically falls in the lead up to the debt ceiling being reached ... so I think the dollar gains overnight were partly an unwinding of previous falls driven by concerns about a U.S. default," said Carol Kong, a currency strategist at Commonwealth Bank of Australia.