Perhaps you should try some spelling variations:
open learning » open burning
learning a » learning 1
kann von » kann man, kann ein, bonn von
von open » von oben
yang jin » yang jie, yang jun, ying jin
yang yi » yang jui
yang xi » yang jui
man » main, many, mean

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 man kann von open learning a ((yang jin) OR (((((yang yi) OR (yang xi))) OR (yang di)))) ;~.
• Adding a wildcard symbol may retrieve word variants: one man kann von open learning a ((yang jin) or (((((yang yi) or (yang xi))) or (yang di)))) ;*.