Perhaps you should try some spelling variations:
yuan ping » yuan ming, yuan ting, yuen ping
liu gang » liu gangs, liu yang, li gang
kong siu » kong eiu, wong siu, dong sin
wan yan » wang yan, nan yan, wai yan
dong di » dong sin
ya yuan » yan yuan
yi yang » yin yang, yi gang, yu yang
yu gang » xu gang, yi gang, yu fang

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