Born in the US to Vietnamese parents, Nguyễn competed for the national swimming team at the SEA Games in Malaysia two years ago for the first time and grabbed four bronze medals.
The South Korean extended his contract with the VFF last week. His salary was not revealed but it is said to be about US$50,000 per month.
Park Hang-seo has extended his contract to coach the Vietnamese national and U23 team until 2022. The new contract will become effective from next February.
Hải is a skillful player with the abilities of a leader who can manage the defence well and start attacks.