Perhaps you should try some spelling variations:
wang yidan » wang yan
fang yang » wang yang, yang yang, huang yang
wang dan » wang yan, wang ban, wang yang
yin yang » ying yang, yin fang, yin hang
yu fang » yu gang, yu wang, yu yang
yi yang » yi gang, yu yang, ying yang
yun yu » lun yu

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 dan) OR (wang yidan)) yun yu fang yang ((yi yang) OR (yin yang)) (hai OR hadi) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang dan) or (wang yidan)) yun yu fang yang ((yi yang) OR (yin yang)) (hai or hadi) ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang dan) or (wang yidan)) yun yu fang yang ((yi yang) OR (yin yang)) (hai or hadi) ;*.