Lê Thị Mộng Tuyền gained her first international experience at the 2010 Asian Games in Guangzhou , where she finished fourth in the Vietnamese 4-by-100-meter relay in 44.77 seconds. In 2015 she took part in the Asian Championships in Wuhan for the first time , where she was eliminated in the first round over 100 and 200 meters with 12.30 s and 25.26 s, respectively. At the 2017 Southeast Asian Games in Kuala Lumpur , she finished seventh in the 100-meter run in 11.90 s and won the gold medal in the Vietnamese relay in 43.88 s. In 2018 she again took part in the Asian Games in Jakarta , where she was eliminated in the first round over 100 meters in 11.98 s. In addition, she finished seventh with the relay in 45.42 s. In 2019 she won the bronze medal behind the teams from Thailand and the Philippines at the Southeast Asian Games in Capas in 45.17 seconds.