Perhaps you should try some spelling variations:
virtual library » virtual laboratory
vision library » design library, visual library, asio library
vision linear » piston linear, emission linear, von linear
gson library » open library, own library, town library

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 (vision linear))) OR (((virtual library) OR (visual binary))))) OR (gson library))%22.
• Adding a wildcard symbol may retrieve word variants: %22theory and ((((((vision library) or (vision linear))) or (((virtual library) or (visual binary))))) or (gson library))%22*.