Perhaps you should try some spelling variations:
virtual library » virtual laboratory
vision library » design library, visual library, boston library
vision linear » piston linear, emission linear, von linear
asio library » asic library, basis library, basic library
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 (asio library))) OR (virtual library))) OR (gson library))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22theory and ((((((((vision library) OR (vision linear))) or (asio library))) or (virtual library))) or (gson library))%22".
• Adding a wildcard symbol may retrieve word variants: %22theory and ((((((((vision library) OR (vision linear))) or (asio library))) or (virtual library))) or (gson library))%22*.