Perhaps you should try some spelling variations:
visual library » virtual library, visual literacy, visual binary
von linearen » der linearen
gson library » own library, town library
von linear » non linear

Try widening your search to All Fields.

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: %22theory AND ((((((von linear) OR (von linearen))) OR (visual library))) OR (((gson library) OR (((open library) OR (chosen library))))))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22theory and ((((((von linear) OR (von linearen))) or (visual library))) or (((gson library) or (((open library) or (chosen library))))))%22".
• Adding a wildcard symbol may retrieve word variants: %22theory and ((((((von linear) OR (von linearen))) or (visual library))) or (((gson library) or (((open library) or (chosen library))))))%22*.