The index closed 12.45 points higher after gaining 3.22 points yesterday.
Trading on the Ho Chi Minh Stock Exchange (HoSE) increased by 32% to VND 18.35 trillion ($781.52 million).
The VN-30 basket, comprising the 30 largest capped stocks, saw 23 tickers gain.
The HNX-Index at the Hanoi Stock Exchange, where mid and small-caps list, was up 0.92%, while the UPCoM-Index at the Unlisted Public Companies Market was up by 0.54%.