Hải Huy came from the youth training academy of Than Quảng Ninh.[2][3] He played an important role in helping Than Quảng Ninh win promotion to the V.League in 2014.[4] That season, at the age of 23, Hải Huy scored 7 goals.[5]
Overlooked for selection by Vietnam during his spell in Than Quang Ninh, Hai Huy won his first full cap on 14 December 2022, replacing Phạm Tuấn Hải for the last 30 minutes of the 1–0 friendly win over Philippines in Hanoi.[14]