The index closed 2.41 points higher after losing 0.86 points on Tuesday.
Trading on the Ho Chi Minh Stock Exchange (HoSE) fell by 8.78% to VND8.86 trillion ($377.84 million).
The VN-30 basket, comprising the 30 largest capped stocks, saw 20 tickers gain.
NVL of property developer Novaland Group led with a 6.8% surge.
PDR of Phat Dat Real Estate Development went up 3.9%, and ACB of Asia Commercial Bank rose 3.2%.
SAB of brewer Sabeco went up 2.8%, and SSI of leading brokerage SSI Securities Corporation gained 2.1%.
Ten blue chips fell, with VRE of retail real estate arm Vincom Retail losing 3.1% and VCB of state-owned lender Vietcombank falling 2.5%.
Foreign investors were net buyers to the tune of VND244.61 billion, mainly buying CTG of state-owned lender VietinBank and VIC of private conglomerate Vingroup.
The HNX-Index at the Hanoi Stock Exchange, where mid and small caps list, was up 0.49% while the UPCoM-Index at the Unlisted Public Companies Market was down by 0.15%.