Perhaps you should try some spelling variations:
virtual library » virtual laboratory
vision library » design library, vision linear, asio library
visual library » visual literacy, visual binary, visual lidar
gson library » open library, town library
own library » open library

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