 In 2015 December, Thein Zaw moved to Yangon United.Thein Zaw made his debut on 19 May 2014 in the AFC Challenge Cup against the host Maldives.In the match Thein Zaw was controversially sent off in the 22 minute by referee Abdullah Balideh for alleged handball, a charge fervently denied by Myanmar's coach Radojko Avramović, as the ball seemed to bounce off his chest rather than his arm.