The index closed 0.46 points higher after gaining 33.14 points in the previous session.
Trading on the Ho Chi Minh Stock Exchange increased by 18% to VND21.99 trillion ($902.06 million).
The VN-30 basket, comprising the 30 largest capped stocks, saw eight tickers gained.
VIC of private conglomerate Vingroup went up 5.6%, followed by VHM of property giant Vinhomes with a 4.6% rise.
VRE of retail real estate arm Vincom Retail closed 2.5% higher and BCM of Becamex Investment and Industrial Development gained 2.3%.
Eighteen blue chips fell.
VJC of budget airline Vietjet dropped 4.1% and SAB of brewer Sabeco fell 1.8%.
Foreign investors were net sellers to the tune of VND806 billion, mainly selling VHM and VCB of state-owned lender Vietcombank.
The HNX-Index for stocks on the Hanoi Stock Exchange, home to mid and small caps, rose 0.53%, while the UPCoM-Index for the Unlisted Public Companies Market went up 0.05%.