The index closed 10.05 points higher after gaining 2.42 points in the previous session.
Trading on the Ho Chi Minh Stock Exchange increased by 6% to VND15.51 trillion ($635 million).
The VN-30 basket, comprising the 30 largest capped stocks, saw 26 tickers gained.
TCB of private lender Techcombank led with a 4.6% rise, followed by CTG of state-owned lender VietinBank, up 3.2%.
HDB of HDBank rose 2.4% and TPB of private TPBank closed 2.2% higher.
Only one ticker fell. MWG of electronics retail chain Mobile World closed 0.9% lower.
Foreign investors were net sellers to the tune of VND8 billion, mainly selling NVL of property developer Novaland Group and VNM of dairy giant Vinamilk.
The HNX-Index for stocks on the Hanoi Stock Exchange, home to mid and small caps, rose 0.18%, while the UPCoM-Index for the Unlisted Public Companies Market went up 0.53%.