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