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