Perhaps you should try some spelling variations:
cao's when » cases when
when goal » when coal, when good
doing un » doing und, doing our, doing von
goal min » goal link, goal fig
yang jin » yang jun, ying jin, shang jin
yang jie » yang jui, yang yi, yang jun
yang xi » yang yi, yang jui

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: doing un dan cao's when goal min ((((yang jin) OR (yang jie))) OR (((yang di) OR (yang xi)))) ;~.
• Adding a wildcard symbol may retrieve word variants: doing un dan cao's when goal min ((((yang jin) or (yang jie))) or (((yang di) or (yang xi)))) ;*.