Hoang played in the 1995 Women's Interzonal Tournament in Chișinău. She won the World Girls U-20 Championship in 1998. In 2000, she won Asian Women's Championship in Udaipur. Hoang won the gold medal as the best player on board 1 at the 2005 European Club Cup for Women in Saint-Vincent, Aosta Valley, with a score of 80.0%. The following year she transferred national federations from Vietnam to Hungary. In 2007, Hoang became Grandmaster; the twelfth woman to reach that rank.