Perhaps you should try some spelling variations:
wang yidan » wang yan
yidan yang » dan yang, yin yang
phan thanh » tran thanh
van thanh » tran thanh, lam thanh, van chinh
tan ying » ran ying, tan yang, tan yong
fan ying » fan xing, ran ying, jin ying
yang xi » yang di, yang yi, yang jui

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 (fan ying))) OR (du yang)) yu ((van thanh) OR (phan thanh)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yidan yang xi ((((tan ying) or (fan ying))) or (du yang)) yu ((van thanh) OR (phan thanh)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang yidan yang xi ((((tan ying) or (fan ying))) or (du yang)) yu ((van thanh) OR (phan thanh)) ;*.