Perhaps you should try some spelling variations:
fang zheng » fang zhen, tang zheng, wang zheng
wang tang » wang yang, tang tang, wang liang
tang fang » tang tang, zhang fang, yang fan
fang yuan » wang yuhan, wang yan, meng yuan
yin yang » ying yang, yin fang, yin hang
yi yang » yi gang, yu yang, ying yang
sheng » cheng

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 tang fang yuan ((yi yang) OR (yin yang)) xi ((fang zheng) OR (fang sheng)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang tang fang yuan ((yi yang) or (yin yang)) xi ((fang zheng) OR (fang sheng)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang tang fang yuan ((yi yang) or (yin yang)) xi ((fang zheng) OR (fang sheng)) ;*.