Da Nang remained on top of the top-flight V-League after a 1-0 hard-fought home win in the 22nd round over Binh Duong at the Chi Lang Stadium on Sunday.
Argentine striker Nicolas Hernandez scored the only goal in the final minutes of the game.
Binh Duong, the 2007-08 champs, are in the middle of the 14-team table with 29 points while, with 44 points, Da Nang, the 2009 champs, are just two points clear of the 2010 champs Hanoi T&T.
Hanoi T&T had a 2-0 away win over bottom side Hai Phong on Saturday.
Reigning champs Song Lam Nghe An and Sai Gon Xuan Thanh also took wins over Kien Giang and Dong Thap at the weekend to remain in fourth and third spots respectively.
The teams near the bottom, including Kien Giang, Dong Thap and Khanh Hoa, all suffered losses, keeping them nailed to their positions. Khanh Hoa, Kien Giang and Dong Thap are second, third and fourth from the bottom respectively.
One of these teams are likely to be the second team to be relegated. Hai Phong were officially relegated to the second-flight First Division after their weekend defeat.