The index closed 7.87 points higher after losing 5.47 points on Wednesday.
Trading on the Ho Chi Minh Stock Exchange (HoSE) fell by 11.56% to VND11.74 trillion ($500.75 million).
The VN-30 basket, comprising the 30 largest capped stocks, saw 20 tickers gain.
VIB of Vietnam International Commercial Bank led with a 3.1% rise, followed by VHM of property giant Vinhomes, up 3%.
VCB of state-owned lender Vietcombank went up 2.4% and FPT of IT giant FPT Corporation closed 1.7% higher.
Seven blue chips fell, with PDR of Phat Dat Real Estate Development losing 1.5%.
HDB of HDBank lost 1%.
Foreign investors were net buyers to the tune of VND102.24 billion, mainly buying HPG of steelmaker Hoa Phat Group and VHM of property giant Vinhomes.
The HNX-Index at the Hanoi Stock Exchange, where mid and small caps list, was up 0.07% while the UPCoM-Index at the Unlisted Public Companies Market was up by 0.42%.