In 2008, Nguyễn Tử Quảng cooperated with Vietnamese Ministry of Training and Teaching in the investigation on the "disclose on the Team A Mathematics exam queries" from the 2009 College Entrance Test in Vietnam. He and BKIS have been rewarded then Nguyễn Tử Quảng was really criticized when he commercialized https://nybookmark.com/story10623041/bkav-options