Perhaps you should try some spelling variations:
ding freund » ein freund
freund das » freud das, freund lass, freunde des
coase what » case what, choose what, care what
yang jin » yang jie, yang jun, ying jin
yang jui » yang judy, yang xi
yang yi » yang xi
do min » do men

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: ding freund das coase what do min ((((yang jin) OR (yang jui))) OR (((yang di) OR (yang yi)))) ;~.
• Adding a wildcard symbol may retrieve word variants: ding freund das coase what do min ((((yang jin) or (yang jui))) or (((yang di) or (yang yi)))) ;*.