The index closed 12.44 points higher after gaining 6.53 points in the previous session.
Trading on the Ho Chi Minh Stock Exchange increased by 12% to VND14.80 trillion ($602.85 million).
The VN-30 basket, comprising the 30 largest capped stocks, saw 26 tickers gained.
BID of state-owned lender BIDV led with a 4.9% rise, followed by CTG of state-owned lender VietinBank, up 3.5%.
MSN of conglomerate Masan Group rose 2.1% and GAS of state-owned Petrovietnam Gas went up 1.9%.
Three blue chips fell. SSI of leading brokerage SSI Securities Corporation and VHM of property giant Vinhomes both lost 0.3% while VIC of private conglomerate Vingroup went down 0.1%.
Foreign investors were net buyers to the tune of VND179 billion, mainly buying MWG of electronics retail chain Mobile World and HPG of steelmaker Hoa Phat Group.
The HNX-Index for stocks on the Hanoi Stock Exchange, home to mid and small caps, fell 0.19%, while the UPCoM-Index for the Unlisted Public Companies Market went up 0.35%.