Perhaps you should try some spelling variations:
knowing about » known about, know about, knowing your
wang ying » wang yang, wang yong, wang jing
ying yang » yang yang, yin yang, ying chang
yang muxi » yang jui, yang xi, yang hui
yang jie » yang jin, yang jui, yang xi
ying jin » yang jin, jing ji

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 ying yang muxi rein ((((yang jie) OR (yang di))) OR (ying jin)) knowing about ;~.
• Adding a wildcard symbol may retrieve word variants: wang ying yang muxi rein ((((yang jie) or (yang di))) or (ying jin)) knowing about ;*.