Perhaps you should try some spelling variations:
virtual library » virtual laboratory
visual lidar » visual aids, visual light, dial lidar
gson library » open library, own library, town library
visual aid » visual aids, visual art

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