Perhaps you should try some spelling variations:
"acta philosophical pessimism" » "acta philosophical presentism", "acta philosophical scepticism", "acta philosophical skepticism", "meta philosophical pessimism", "a philosophical pessimism", "both philosophical pessimism"
"acta philosophical feminism" » "acta philosophical darwinism", "acta philosophical egoism", "acta philosophical realism", "meta philosophical feminism", "a philosophical feminism", "both philosophical feminism"
"art philosophical feminism" » "art philosophical darwinism", "art philosophical egoism", "art philosophical realism", "care philosophical feminism", "east philosophical feminism", "last philosophical feminism"
"art philosophical humanism" » "art philosophical posthumanism", "art philosophical idealism", "art philosophical realism", "care philosophical humanism", "east philosophical humanism", "last philosophical humanism"

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: (((("acta philosophical feminism") OR ("acta philosophical pessimism"))) OR ((("art philosophical feminism") OR ("art philosophical humanism")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"acta philosophical feminism\") or (\"acta philosophical pessimism\"))) or (((\"art philosophical feminism\") OR (\"art philosophical humanism\"))))".
• Removing quotes may allow a broader search: (((( acta philosophical feminism ) or ( acta philosophical pessimism ))) or ((( art philosophical feminism ) OR ( art philosophical humanism )))).
• Adding a wildcard symbol may retrieve word variants: (((("acta philosophical feminism") or ("acta philosophical pessimism"))) or ((("art philosophical feminism") OR ("art philosophical humanism"))))*.