The index closed 12.14 points higher after losing 0.44 points on Friday.
Trading on the Ho Chi Minh Stock Exchange (HoSE) fell by 10.97% to VND9.61 trillion ($409.28 million).
The VN-30 basket, comprising the 30 largest capped stocks, saw 22 tickers gain.
PLX of fuel distributor Petrolimex led with a 4% rise.
It was followed by BID of state-owned lender BIDV with a 3.8% increase.
POW of electricity producer Petrovietnam Power Corporation went up 3.3%, and VCB of state-owned lender Vietcombank gained 3.2%.
Six blue chips fell.
VIB of Vietnam International Commercial Bank lost 2.7%, and MWG of electronics retail chain Mobile World was down 1.4%.
Foreign investors were net buyers to the tune of VND392.20 billion, mainly buying STB of Ho Chi Minh City-based lender Sacombank and SSI of leading brokerage SSI Securities Corporation.
The HNX-Index at the Hanoi Stock Exchange, where mid and small caps list, was down 0.38% while the UPCoM-Index at the Unlisted Public Companies Market was up by 0.56%.