Perhaps you should try some spelling variations:
van thanh » tran thanh, phan thanh, lam thanh
wong shiu » wong siu, cong shu, song shin
yan than » yan zhang, yan clan, yan guan
yang jin » yang jie, yang jun, ying jin
yang jui » yang judy, yang di, yang yi
yang xi » yang di, yang yi
a chen » ta chen, _ chen, n chen
wang » wing, wan, lang

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((yan than) OR (van thanh)) a chen ((((yang jin) OR (yang xi))) OR (yang jui)) wong shiu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yan than) OR (van thanh)) a chen ((((yang jin) or (yang xi))) or (yang jui)) wong shiu ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((yan than) OR (van thanh)) a chen ((((yang jin) or (yang xi))) or (yang jui)) wong shiu ;*.