The index closed 13.13 points higher after losing 0.3 points on Friday.
Trading on the Ho Chi Minh Stock Exchange (HoSE) increased by 15.92% to VND10.78 trillion ($459.74 million).
The VN-30 basket, comprising the 30 largest capped stocks, saw 26 tickers gain.
GVR of Vietnam Rubber Group led with a 4.5% surge, followed by SSI of leading brokerage SSI Securities Corporation, up 4%.
VCB of state-owned lender Vietcombank closed 3.6% higher and BID of state-owned lender BIDV gained 2.9%.
Only two blue chips fell. NVL of property developer Novaland Group lost 4.4% and TPB of private TPBank closed 0.4% lower.
Foreign investors were net sellers to the tune of VND13.45 billion, mainly selling CTG of state-owned lender VietinBank.
The HNX-Index at the Hanoi Stock Exchange, where mid and small caps list, was up 1.50% while the UPCoM-Index at the Unlisted Public Companies Market was up by 1.06%.