Vietcombank sold the greenback 0.19% lower at VND25,630.
The State Bank of Vietnam slashed its reference rate by 0.05% to VND24,738.
Unofficial exchange points sold the greenback 0.21% higher at VND25,885.
Globally the greenback wallowed near a four-month trough against a basket of major peers as U.S. President Donald Trump's administration gave a one-month reprieve on auto import levies to Canada and Mexico, again showing how rapidly the trade landscape can shift, Reuters reported.
The euro was flat at $1.0792 in the Asian morning, after earlier touching $1.0803 for the first time since November 8.
The U.S. dollar index was little changed at 104.31, after easing to 104.25 overnight for the first time since November 8.