In February 2022, due to numerous
COVID-19 cases within the
Vietnam U23 squad, Thanh Nhân and 9 other players were additionally called up to the team for the
2022 AFF U-23 Championship in
Cambodia. He played two matches in total during the tournament, including the 1–0 against
Thailand in group stage and the semi-final victory against
Timor Leste, in which he scored the winning penalty to help U23 Vietnam won 5–3 in the
penalty shoot-out. His teammates secured the title by defeating Thailand 1–0 again in the final. In June 2022,
Gong Oh-kyun named Thanh Nhân in the Vietnam U23's squad for the
2022 AFC U-23 Asian Cup in
Uzbekistan. Thanh Nhân played in the 3 matches during the tournament and had an assist in the group stage match against
Malaysia with a cross to help
Nhâm Mạnh Dũng headed the opener. The match ended in a 4–0 win for Vietnam. ==Career statistics==