Perhaps you should try some spelling variations:
wang yang » wang yan, wang liang, wang yanling
one class » one case
ying jin » yang jin, jing ji, yang jie
class a » class _, class 4
yang xi » yang jui
yang yi » yang jui
a bit » a big
bit e » bit _, lit e, bic e

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: one class a bit e ((((ying jin) OR (wang yang))) OR (yang xi)) ((yang di) OR (yang yi)) ;~.
• Adding a wildcard symbol may retrieve word variants: one class a bit e ((((ying jin) or (wang yang))) or (yang xi)) ((yang di) or (yang yi)) ;*.