Perhaps you should try some spelling variations:
20 philosophy » 2 philosophy, 10 philosophy, 23 philosophy
3 philosophy » 2 philosophy
5 philosophy » 2 philosophy
6 philosophy » 6 philosophie

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: %22science %((20 philosophy) OR (((((2((((3 philosophy) OR (5 philosophy))) OR (6 philosophy))) OR (((((3 philosophy) OR (5 philosophy))) OR (6 philosophy))))) OR (1 philosophy))))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22science %((20 philosophy) or (((((2((((3 philosophy) OR (5 philosophy))) or (6 philosophy))) or (((((3 philosophy) OR (5 philosophy))) or (6 philosophy))))) or (1 philosophy))))%22".
• Adding a wildcard symbol may retrieve word variants: %22science %((20 philosophy) or (((((2((((3 philosophy) OR (5 philosophy))) or (6 philosophy))) or (((((3 philosophy) OR (5 philosophy))) or (6 philosophy))))) or (1 philosophy))))%22*.