Perhaps you should try some spelling variations:
yuan kang » yuan wang, yuan chang, chan kang
kang yang » wang yang, yang yang, kang young
dang hadi » dang hai
yan yuan » yan guan, fang yuan, nan yan
kang hay » eang hay, kang han, dang hai
wan yan » wang yan, nan yan, wang yang
wai yan » wang yan, wei yang
yang xi » yang di, 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: ((wan yan) OR (wai yan)) yan yuan kang yang xi ((kang hay) OR (dang hadi)) ;~.
• Adding a wildcard symbol may retrieve word variants: ((wan yan) or (wai yan)) yan yuan kang yang xi ((kang hay) or (dang hadi)) ;*.