Perhaps you should try some spelling variations:
"philanthropists" » "philanthropic", "philanthropos", "philanthropics", "philanthroposs", "philanthropys"
"philanthropist" » "philanthropic", "philanthropos", "philanthropy"
"philanthropism" » "philanthropinism", "philanthropismus", "philanthrophist"

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: (("philanthropists" OR "philanthropist") OR "philanthropism").
• Removing quotes may allow a broader search: (( philanthropists or philanthropist ) or philanthropism ).
• Adding a wildcard symbol may retrieve word variants: (("philanthropists" or "philanthropist") or "philanthropism")*.