Perhaps you should try some spelling variations:
wang yuhan » wang luhang, wang yan, wang yidan
yuhan kang » yuan kang, chan kang, yuhuan huang
yang jing » wang jing, yang jin, huang jing
jing wang » jing fang, ping wang, hong wang
kang han » kang chen, kong hang, zhang han
yang xi » yang jui
yang yi » yang jui

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: yang jing wang yuhan kang ((yang xi) OR (((yang yi) OR (yang di)))) kang han ;~.
• Adding a wildcard symbol may retrieve word variants: yang jing wang yuhan kang ((yang xi) or (((yang yi) or (yang di)))) kang han ;*.