Chung Nguyen Do

Chung Thanh Nguyen Do (Bulgarian: Чунг Тханг Нгуен До; born 23 May 2005), also known as Trần Thành Trung, is a professional footballer who plays as a midfielder for V.League 1 club Ninh Binh. Born in Bulgaria, he represented his native country at youth international levels before opting to play for Vietnam in 2025. Starting as a goalkeeper, he switched to midfielder because he wanted to enjoy the game more. In the summer of 2022, it was reported that Barcelona are interested in Do. In January 2023 he was promoted to the first team and joined the winter camp. Chung completed his professional debut in a league match against Pirin Blagoevgrad on 13 January 2023.

On 27 July 2025, Do was transferred to V.League 1 club Ninh Binh, signing a five-year contract with the Vietnamese side, for a reported transfer fee of €500,000.

International career Bulgaria Youth Being eligible for both Bulgaria and Vietnam, Do represented Bulgaria at youth level. He was called up for Bulgaria U17 in 2021 and helped the team to qualify to the European U17 Championship. Chung was in the squad for the 2022 UEFA European Under-17 Championship. In September 2022 he was called up for Bulgaria U19 for the 2023 UEFA European Under-19 Championship qualification matches.

On 18 March 2023, he received his first call-up for the Bulgaria U21 for the friendly tournament Antalya Cup between 25 and 28 March 2023.

Vietnam On 6 August 2025, Do's request to switch international allegiance to Vietnam was approved by FIFA. On 25 August 2025, he was called up to the Vietnam under-23 national team for the first time to prepare for the 2026 AFC U-23 Asian Cup qualification. However, he was dropped from the final squad due to an injury.

On 13 October 2025, Do made his debut for Vietnam U23 in a friendly match against Qatar U23.

Personal life Do has Vietnamese citizenship since 2018, under the name Trần Thành Trung. His brother Thang Chung Chan (Trần Trung Thắng) is also a footballer and plays for his former team Slavia Sofia.

Career statistics Club