Perhaps you should try some spelling variations:
visual library » virtual library, visual literacy, visual binary
vision linear » piston linear, emission linear, motion linear
gson library » own library, town library
open library » opencv library, chosen library
von linear » non linear, von linearen

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