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%.