Perhaps you should try some spelling variations:
20 philosophy » 10 philosophy, 23 philosophy, 24 philosophy
13 philosophy » 3 philosophy, 10 philosophy, 14 philosophy
4 philosophy » 5 philosophy, 3 philosophy, 8 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 (((4 philosophy) OR (((6 philosophy) OR (1 philosophy))))))) OR (((13 philosophy) OR (2 philosophy))))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22science %((((20 philosophy) or (((4 philosophy) or (((6 philosophy) OR (1 philosophy))))))) or (((13 philosophy) or (2 philosophy))))%22".
• Adding a wildcard symbol may retrieve word variants: %22science %((((20 philosophy) or (((4 philosophy) or (((6 philosophy) OR (1 philosophy))))))) or (((13 philosophy) or (2 philosophy))))%22*.