HAGL dominated the first few minutes, putting the visitors on edge when an attack co-ordinated by Tran Vu, Timothy and Sakda nearly converted into a goal.
The match balanced out after around 10 minutes with the two teams exchanging shots towards the other’s goal.
In the 25th minute, Van Quyet put Hanoi T&T ahead after his skilful kick defeated HAGL’s goalkeeper Bassey.
The visitors extended the lead to 2-0 in the 57th minute when striker Samson headed the ball into Bassey’s net.
HAGL pulled a goal back 15 minutes later from a penalty kick awarded to Timothy after he was fouled by Sam Gallagher in Hanoi T&T’s penalty area.
In the remaining time of the match, Samson and Van Quyet each scored one more goal to end the game 4-1, bringing the second victory for Hanoi T&T of the 2014 V-League season.
In another match, Than Quang Ninh, promoted to the professional football league for the first time, surprised all when beating Ninh Binh 3-1 despite being outclassed in the first half.
The second round of V-League 2014 will continue with two matches Dong Tam Long An vs Vicem Hai Phong and Thanh Hoa vs SHB Da Nang on January 18.