The index closed 13.29 points higher after gaining 12.17 points in the previous session.
Trading on the Ho Chi Minh Stock Exchange increased by 10% to VND23.06 trillion ($935.97 million).
The VN-30 basket, comprising the 30 largest capped stocks, saw 21 tickers gained.
HPG of steelmaker Hoa Phat Group led with a 5.4% surge, followed by SSI of leading brokerage SSI Securities Corporation, up 2.3%.
VHM of property giant Vinhomes rose 2% and GAS of state-owned Petrovietnam Gas closed 1.8% higher.
Four blue chips fell, including BID of state-owned lender BIDV with a 1% fall.
Foreign investors were net buyers to the tune of VND41 billion, mainly buying STB of Ho Chi Minh City-based lender Sacombank and VPB of private lender VPBank.
The HNX-Index for stocks on the Hanoi Stock Exchange, home to mid and small caps, rose 1.08%, while the UPCoM-Index for the Unlisted Public Companies Market went down 0.10%.