Perhaps you should try some spelling variations:
yuan ping » yuan ming, yuan ting, yuen ping
lang yan » wang yan, wang yang, zhang yan
kong siu » wong siu, dong sin, kong sar
kong eiu » tonga eiu
dong di » dong sin
ya yuan » yan yuan
yu gang » yi gang, yu fang, yu wang
xu gang » zum gang, liu gang, zu gange

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: ((lang yan) OR (dong di)) ya yuan ping ((yu gang) OR (xu gang)) ((kong siu) OR (kong eiu)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((lang yan) or (dong di)) ya yuan ping ((yu gang) or (xu gang)) ((kong siu) OR (kong eiu)) ;~".
• Adding a wildcard symbol may retrieve word variants: ((lang yan) or (dong di)) ya yuan ping ((yu gang) or (xu gang)) ((kong siu) OR (kong eiu)) ;*.