Perhaps you should try some spelling variations:
yuan ping » yuan ming, yuan ting, yuen ping
yang yang » wang yang, wang yan
wong siu » wong shiu, kong siu, wong sau
wan yan » wang yan, wai yan, wang yang
nan yan » nan ya, wang yan, qian yan
dong di » dong sin
ya yuan » yan yuan
yu fang » yu gang, yu wang, yu yang

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: ((((wan yan) OR (nan yan))) OR (dong di)) ya yuan ping ((yang yang) OR (yu fang)) wong siu ;~.
• Adding a wildcard symbol may retrieve word variants: ((((wan yan) or (nan yan))) or (dong di)) ya yuan ping ((yang yang) or (yu fang)) wong siu ;*.