Perhaps you should try some spelling variations:
dong ping » dong sin, dong bin, dong jung
one case » some case, one class, one phase
case das » case des, case case, case data
don chen » done when, goh chen, don ce
yang jie » yang jin, yang xi, yang yi
yang jui » yang judy, yang xi, yang yi
das don » das den, des don, das dorf

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 case das don chen ((((yang jie) OR (dong ping))) OR (yang jui)) ((wang yan) OR (yang di)) ;~.
• Adding a wildcard symbol may retrieve word variants: one case das don chen ((((yang jie) or (dong ping))) or (yang jui)) ((wang yan) or (yang di)) ;*.