Perhaps you should try some spelling variations:
cheng yuan » cheng guan, cheng han, chen yulan
yuan cheng » yuan chang, huang cheng, yu cheng
yuan wang » yan wang, yuan kang, yuan chang
kong siu » kong eiu, wong siu, kong sar
wan yan » wang yan, nan yan, wai yan
ya yuan » yan yuan
sin » sign, sind, skin

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 cheng yuan wang ((kong siu) OR (dong sin)) ;~.
• Adding a wildcard symbol may retrieve word variants: ((wan yan) or (dong di)) ya yuan cheng yuan wang ((kong siu) or (dong sin)) ;*.