The index closed 10.42 points higher after gaining 5.42 points in the previous session.
Trading on the Ho Chi Minh Stock Exchange increased by 23% to VND17.496 trillion (US$685.7 million).
The VN-30 basket, comprising the 30 largest capped stocks, saw 26 tickers rose.
GVR of Vietnam Rubber Group and BCM of Becamex Investment and Industrial Development both went up by 2.6%, followed by MWG of electronics retail chain Mobile World with a 2.4% gain.
Three blue chips fell, namely BVH of insurance company Bao Viet Holdings with a 1.4% drop, SSB of SeABank with a 0.8% decline, and HPG of steelmaker Hoa Phat Group, which closed 0.2% lower.
Foreign investors were net buyers to the tune of VND354 billion, mainly buying FPT of IT giant FPT Corporation and OCB of Orient Commercial Joint Stock Bank.
The HNX-Index for stocks on the Hanoi Stock Exchange, home to mid and small caps, rose 0.83%, while the UPCoM-Index for the Unlisted Public Companies Market went down 0.19%.