Perhaps you should try some spelling variations:
wang yidan » wang yan
yidan yang » dan yang, yin yang
tran thanh » tran trang
tan ying » fan ying, ran ying, tan yang
jin ying » li ying
yang xi » yang di, yang yi, yang jui
yu tran » you train, duc tran, eu trans

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 yidan yang xi ((((tan ying) OR (jin ying))) OR (du yang)) yu tran thanh ;~.
• Adding a wildcard symbol may retrieve word variants: wang yidan yang xi ((((tan ying) or (jin ying))) or (du yang)) yu tran thanh ;*.