Perhaps you should try some spelling variations:
wang yuhan » wang luhang, wang yan, wang yidan
yang weng » huang weng, yang yang, yang jing
fang yuan » wang yan, meng yuan, tang yun
yan yuan » yan guan, nan yan, yan clan
kang hay » eang hay, dang hai, kang tae
kang han » kang chen, kong hang, zhang han
dan yan » dan yang, nan yan, wang yan

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 weng ((fang yuan) OR (wang yuhan)) dan yan yuan ((kang hay) OR (kang han)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "yang weng ((fang yuan) or (wang yuhan)) dan yan yuan ((kang hay) OR (kang han)) ;~".
• Adding a wildcard symbol may retrieve word variants: yang weng ((fang yuan) or (wang yuhan)) dan yan yuan ((kang hay) OR (kang han)) ;*.