He started training when he was 13 years old. Duy is one of two most players (with Trịnh Quang Vinh) in training with U-19 The Cong at
Bulgaria (2006). He has been known since
2008 V-League, he was a component of
Thể Công when his team had the flourish time on that season, topped the league table but they was touched in eighth-placed. He is said to "not have high fitness" but "has a good
speed with ingenious left foot so he's very dangerous when playing at left-back". On December 30, 2008, Ngoc Duy was called to
Vietnam by coach
Henrique Calisto to prepare for the matches in
2011 AFC Asian Cup qualification against
Lebanon and
China. == Honours ==