Perhaps you should try some spelling variations:
"meta philosophical pessimism" » "meta philosophical presentism", "meta philosophical scepticism", "meta philosophical skepticism", "a metaphilosophical pessimism", "a philosophical pessimism", "e philosophical pessimism"
"acta philosophical feminism" » "acta philosophical darwinism", "acta philosophical egoism", "acta philosophical realism", "art philosophical feminism", "a philosophical feminism", "all philosophical feminism"
"meta philosophical humanism" » "meta philosophical posthumanism", "meta philosophical idealism", "meta philosophical realism", "a metaphilosophical humanism", "a philosophical humanism", "e 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 ((("meta philosophical humanism") OR ("meta philosophical pessimism")))).
• Removing quotes may allow a broader search: (( acta philosophical feminism ) or ((( meta philosophical humanism ) or ( meta philosophical pessimism )))).
• Adding a wildcard symbol may retrieve word variants: (("acta philosophical feminism") or ((("meta philosophical humanism") or ("meta philosophical pessimism"))))*.