Perhaps you should try some spelling variations:
wien learning » when learning, win learning, open learning
learning a » learning 1
done why » one why, done when, money why
why kann » why can
kann von » kann man, kann ein, bonn von
von wien » von wissen, von weizen, von wegen
yang jui » yang judy

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: done why kann von wien learning a ((yang yi) OR (((((yang xi) OR (yang jui))) OR (yang di)))) ;~.
• Adding a wildcard symbol may retrieve word variants: done why kann von wien learning a ((yang yi) or (((((yang xi) or (yang jui))) or (yang di)))) ;*.