HO CHI MINH CITY – The Cambodian U19 national team were thumped 3-0 by Thailand at the AFF U19 Youth Championships in Thonh Nhat Satdium, Ho Chi Minh City Tuesday. The other Group A fixture, played at Thanh Long Stadium in Ho Chi Minh City, between Australia and Singapore ended 1-1. In Group B, hosts Vietnam beat Malaysia 2-0 in their first match Tuesday.