The index closed with a 6.8-point gain after increasing 4.6 points last Friday.
Trading on the Ho Chi Minh Stock Exchange, on which the index is based, dropped 7% to VND14.40 trillion ($567 million).
The VN30 basket, comprising the 30 largest capped stocks, saw 19 tickers in the green.
POW of electricity producer Petrovietnam Power Corporation led with a 5.7% surge, followed by SAB of brewer Sabeco, up 4%.
FPT of IT giant FPT Corporation gained 3.3% and BCM of Becamex Investment and Industrial Development closed 3.1% higher.
Nine blue chips fell. STB of Ho Chi Minh City-based lender Sacombank dropped 2.1% and CTG of state-owned lender VietinBank closed with a 1.4% decline.
Foreign investors were net sellers to the tune of VND911 billion, mainly selling BWE of Binh Duong Water – Environment Corp and SSI of leading brokerage SSI Securities Corporation.