Perhaps you should try some spelling variations:
some past » some case, time past
wang yang » wang yan, wang liang, wang yanling
past has » post has, past case, past mass
has done » has gone, has one, has money
yang jie » yang jin, yang yi, yang jun
yang jui » yang judy, yang yi
yang xi » yang yi

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: some past has done when ((((yang jie) OR (wang yang))) OR (yang di)) ((yang jui) OR (yang xi)) ;~.
• Adding a wildcard symbol may retrieve word variants: some past has done when ((((yang jie) or (wang yang))) or (yang di)) ((yang jui) or (yang xi)) ;*.