The index closed 21.81 points higher after falling 17.85 points on Monday.
Trading on the Ho Chi Minh Stock Exchange (HoSE), on which the index is based, plunged 28% to VND22.99 trillion ($953.84 million).
The VN30 basket, comprising the 30 largest capped stocks, saw all tickers closed in the green.
SSI of leading brokerage SSI Securities Corporation led with a 6.9% rise, followed by GVR of Vietnam Rubber Group, up 4.4%.
VJC of budget airline Vietjet went up 2.9% and VRE of retail real estate arm Vincom Retail closed 2.8% higher.
Foreign investors were net buyers to the tune of VND146 billion, mainly buying PDR of Phat Dat Real Estate Development and SSI.
The HNX-Index for stocks on the Hanoi Stock Exchange, home to mid and small caps, rose 1.99% while the UPCoM-Index for the Unlisted Public Companies Market gained 0.60%.