Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
one class » one case
song min » song ming, gong min, jong min
yang jie » yang jin, yang xi, yang yi
yang jui » yang judy, yang xi, yang yi
class 4 » class _, class a
4 bin » 4 big, _ bin, 4 bis

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 4 bin we ((((song min) OR (yang yang))) OR (yang jie)) ((yang di) OR (yang jui)) ;~.
• Adding a wildcard symbol may retrieve word variants: one class 4 bin we ((((song min) or (yang yang))) or (yang jie)) ((yang di) or (yang jui)) ;*.