The index closed 6.38 points higher after losing 23.45 points on Tuesday.
Trading on the Ho Chi Minh Stock Exchange (HoSE) fell by 17.73% to VND10.01 trillion ($424.15 million).
The VN-30 basket, comprising the 30 largest capped stocks, saw 17 tickers gain.
HPG of steelmaker Hoa Phat Group rose 5.6%, followed by SAB of brewer Sabeco with a 3.1% rise.
CTG of state-owned lender VietinBank and SSI of leading brokerage SSI Securities Corporation both went up 2.4%.
Twelve blue chips fell, with PLX of fuel distributor Petrolimex plunging 4.6%.
PDR of Phat Dat Real Estate Development lost 3.5% and STB of Ho Chi Minh City-based lender Sacombank dropped 2.9%.
Foreign investors were net buyers to the tune of VND382.22 billion, mainly buying STB of Ho Chi Minh City-based lender Sacombank and HPG.
The HNX-Index at the Hanoi Stock Exchange, where mid and small caps list, was up 0.30% while the UPCoM-Index at the Unlisted Public Companies Market was up by 1.18%.