The index closed 12.1 points higher after losing 10.3 points on Monday.
Trading on the Ho Chi Minh Stock Exchange (HoSE) increased by 6.5% to VND10.17 trillion ($416.59 million).
The VN-30 basket, comprising the 30 largest capped stocks, saw 23 tickers gain.
VIC of biggest private conglomerate Vingroup led with a 4.3% rise.
It was followed by MSN of conglomerate Masan, up 3.8%, and VRE of retail real estate arm Vincom Retail, up 3.6%.
VNM of dairy giant Vinamilk went up 2.7%.
Five blue chips fell, with STB of Ho Chi Minh City-based lender Sacombank losing 2.5%.
HPG of steelmaker Hoa Phat Group fell 2.1%, and SSI of leading brokerage SSI Securities Corporation was down 1.1%.
Foreign investors were net sellers to the tune of VND30.04 billion ($1.23 million), mainly selling HPG and VHM of property giant Vinhomes.
The HNX-Index at the Hanoi Stock Exchange, where mid and small caps list, was up 1.17% while the UPCoM-Index at the Unlisted Public Companies Market was up by 0.39%.