The index closed 0.84 points higher after gaining 14 points on Friday.
Trading on the Ho Chi Minh Stock Exchange (HoSE) fell by 22% to VND10.75 trillion ($457.08 million), lowest since July 27.
The VN-30 basket, comprising the 30 largest capped stocks, saw 11 tickers gained.
VRE of retail real estate arm Vincom Retail rose 4.5% to a two-week high.
MWG of electronics retail chain Mobile World gained 2.8%, while VHM of real estate giant Vinhomes went up 2.5% to a four-week high.
Other gainers included KDH of real estate firm Khang Dien House and CTG of state-owned lender VietinBank, up 0.8% and 0.7%, respectively.
Seventeen blue chips fell, with STB of Ho Chi Minh City-based lender Sacombank falling 2.7%.
SSI of leading brokerage SSI Securities Corporation and GVR of Vietnam Rubber Group dropped 1.6% and 1.4%, respectively.
Foreign investors were net buyers for the third straight session to the tune of VND177.36 billion.
The HNX-Index at the Hanoi Stock Exchange, where mid and small caps list, was down 0.54% while the UPCoM-Index at the Unlisted Public Companies Market was down by 0.43%.