Perhaps you should try some spelling variations:
yang yang » wang yan
wang yang » wang yan, wang liang, wang yanling
yang yan » wang yan, yang fan, yang yao
yan yuan » yan guan, fang yuan, nan yan
tan yang » dan yang, tan ying, tao yang
tan yong » tan hong, tan kong, tan ying
yi yang » yin yang, yi gang, yu yang

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: wang yang yan yuan ((tan yang) OR (tan yong)) ((yi yang) OR (yang yang)) (hai OR hadi) ;~.
• Adding a wildcard symbol may retrieve word variants: wang yang yan yuan ((tan yang) or (tan yong)) ((yi yang) or (yang yang)) (hai or hadi) ;*.