Perhaps you should try some spelling variations:
ying yang » yang yang, yin yang, ying chang
fang yuan » wang yuhan, wang yan, meng yuan
wing yan » wang yan, wing ian, wing tan
yan fang » yan wang, yin fang, yang yang
tan yang » dan yang, tan ying, tao yang
tan yong » tan hong, tan kong, tan ying
yi dang » yi gang, yi yang, yi chang

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