Perhaps you should try some spelling variations:
wang yidan » wang yan
yidan yang » dan yang, yin yang
yang jin » yang jie, yang jun, ying jin
wong sau » wong sam, wong shiu, wong lai
wong siu » wong shiu, kong siu, wong siew
yang yi » yang di, yang xi, yang jui
yi chen » jui chen

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 yidan yang yi chen ((yang yi) OR (yang jin)) ((wong sau) OR (wong siu)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang yidan yang yi chen ((yang yi) or (yang jin)) ((wong sau) or (wong siu)) ;*.