Perhaps you should try some spelling variations:
visual library » virtual library, visual literacy, visual binary
gson library » own library
town library » own library
open library » opencv library, chosen 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 ((visual library) OR (((((gson library) OR (town library))) OR (open library))))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22theory and ((visual library) or (((((gson library) OR (town library))) or (open library))))%22".
• Adding a wildcard symbol may retrieve word variants: %22theory and ((visual library) or (((((gson library) OR (town library))) or (open library))))%22*.