The index closed almost eight points higher after gaining nearly 24 points on Tuesday.
Trading on the Ho Chi Minh Stock Exchange (HoSE) fell by 35.24 percent to VND11.52 trillion ($499.6 million).
The VN-30 basket, comprising the 30 largest capped stocks, saw 16 tickers gain.
CTG of state-owned lender VietinBank rose 6 percent from the lowest in over a year. PNJ of Phu Nhuan Jewelry gained 3.9 percent after two losing sessions. FPT of IT giant FPT Corporation went up 3.6 percent.
Thirteen blue chips fell, with MSN of conglomerate Masan Group dropping 3.6 percent. PLX of fuel distributor Petrolimex dropped 2.8 percent, and BVH of insurance company Bao Viet Holdings dropped 2.5 percent.
Foreign investors were net sellers to the tune of VND98.6 billion, focusing on VNM of dairy giant Vinamilk and DXG of real estate developer Dat Xanh Group.
The HNX-Index at the Hanoi Stock Exchange, where mid and small caps list, was up 0.92 percent while the UPCoM-Index at the Unlisted Public Companies Market was down by 0.27 percent.