The index closed 6.51 points higher after gaining 3.78 points on Friday.
Trading on the Ho Chi Minh Stock Exchange (HoSE) fell by 24.39% to VND9.37 trillion ($400 million).
The VN-30 basket, comprising the 30 largest capped stocks, saw 15 tickers gain.
BID of state-owned lender BIDV gained 6.9%, followed by GVR of Vietnam Rubber Group with a 4.5% rise.
ACB of Asia Commercial Bank went up 3.5%, and CTG of state-owned lender VietinBank gained 3.1%.
Thirteen blue chips fell, with NVL of property developer Novaland Group losing 4.5%.
Foreign investors were net buyers to the tune of VND227.96 billion, mainly buying HPG of steelmaker Hoa Phat Group and BID.
The HNX-Index at the Hanoi Stock Exchange, where mid and small caps list, was down 0.18% while the UPCoM-Index at the Unlisted Public Companies Market was up by 0.18%.