The index closed 10.15 points higher after gaining 0.52 points in the previous session.
Trading on the Ho Chi Minh Stock Exchange increased by 10% to VND21.82 trillion ($858 million).
The VN-30 basket, comprising the 30 largest capped stocks, saw 25 tickers gained.
GVR of Vietnam Rubber Group led with a 4.1% rise, followed by HDB of HDBank, up 3.5%.
BCM of Becamex Investment and Industrial Development closed 3.3% higher and BVH of insurance company Bao Viet Holdings went up 2.6%.
Five blue chips fell. FPT of IT giant FPT Corporation dropped 1.5% and PLX of fuel distributor Petrolimex closed with a 1.1% loss.
Foreign investors were net sellers to the tune of VND461 billion, mainly selling `FPT and MSN of conglomerate Masan Group.
The HNX-Index for stocks on the Hanoi Stock Exchange, home to mid and small caps, rose 1.03%, while the UPCoM-Index for the Unlisted Public Companies Market went up 0.68%.