The index closed 6.55 points higher after gaining 12.45 points in the previous session.
Trading on the Ho Chi Minh Stock Exchange increased by 72% to VND25.29 trillion ($1.04 billion).
The VN-30 basket, comprising the 30 largest capped stocks, saw 21 tickers gained.
MBB of lender MB led with a 5% rise, followed by CTG of state-owned lender VietinBank, up 3.6%.
TPB of private TPBank went up 2.6% and HDB of HDBank closed 2% higher.
Five blue chips fell, including MSN of conglomerate Masan Group, down 1.2%, and BCM of Becamex Investment and Industrial Development, down 1.1%.
Foreign investors were net sellers to the tune of VND21 billion, mainly selling NCG of food producer Nova Consumer and VHM of property giant Vinhomes.
The HNX-Index for stocks on the Hanoi Stock Exchange, home to mid and small caps, rose 0.40%, while the UPCoM-Index for the Unlisted Public Companies Market went down 0.15%.