The index closed 9.51 points higher after losing 7.67 points on Wednesday.
Trading on the Ho Chi Minh Stock Exchange (HoSE) increased by 10.02% to VND15.45 trillion ($649 million).
The VN-30 basket, comprising the 30 largest capped stocks, saw 20 tickers gain.
STB of Ho Chi Minh City-based lender Sacombank led with a 6.9% rise, followed by SSI of leading brokerage SSI Securities Corporation and TCB of the largest private lender Techcombank, both went up 6.8%.
Other gainers included PDR of Phat Dat Real Estate Development, up 5.1% and GVR of Vietnam Rubber Group, up 5%.
Nine blue chips fell, with NVL of property developer Novaland Group hitting floor price with a 6.8% drop.
MSN of conglomerate Masan Group lost 4%, and VRE of retail real estate arm Vincom Retail went down 2.5%.
Foreign investors were net buyers to the tune of VND580.29 billion, mainly buying VIC of biggest private conglomerate Vingroup and STB of Ho Chi Minh City-based lender Sacombank.
The HNX-Index at the Hanoi Stock Exchange, where mid and small caps list, was up 2.59% while the UPCoM-Index at the Unlisted Public Companies Market was up by 1.66%.