The index closed 15.23 points higher after gaining 10.34 points on Friday.
Trading on the Ho Chi Minh Stock Exchange (HoSE) increased by 9.97% to VND24.10 trillion ($1.02 billion).
The VN-30 basket, comprising the 30 largest capped stocks, saw 24 tickers gain.
VHM of property giant Vinhomes and VIC of private conglomerate Vingroup both hit the ceiling with a 7% increase.
VJC of budget airline Vietjet gained 4.3% and BCM of Becamex Investment and Industrial Development went up 3.8%.
Six blue chips fell.
MWG of electronics retail chain Mobile World and VCB of state-owned lender Vietcombank both lost 1.5%
Foreign investors were net buyers to the tune of VND94.11 billion, mainly buying MSB of Vietnam Maritime Commercial Bank and PNJ of Phu Nhuan Jewelry.
The HNX-Index at the Hanoi Stock Exchange, where mid and small caps list, was up 0.85% while the UPCoM-Index at the Unlisted Public Companies Market was up by 0.49%.