The index closed 10.09 points higher after gaining 9.56 points on Wednesday.
Trading on the Ho Chi Minh Stock Exchange (HoSE) fell by 14.33% to VND8.45 trillion ($357.60 million).
The VN-30 basket, comprising the 30 largest capped stocks, saw 26 tickers gain.
HDB of HDBank led with a 3.9% rise, followed by NVL of property developer Novaland Group, up 3.1%.
POW of electricity producer Petrovietnam Power Corporation rose 2.9% and CTG of state-owned lender VietinBank went up 2.8%.
Only two blue chips fell. VCB of state-owned lender Vietcombank dropped 0.6% and MSN of conglomerate Masan Group lost 0.1%.
Foreign investors were net sellers to the tune of VND112.17 billion, mainly selling STB of Ho Chi Minh City-based lender Sacombank and VIC of private conglomerate Vingroup.
The HNX-Index at the Hanoi Stock Exchange, where mid and small caps list, was up 1.38% while the UPCoM-Index at the Unlisted Public Companies Market was up by 0.24%.