Perhaps you should try some spelling variations:
"historian of philosophy" » "historians of philosophy", "histories of philosophy", "historic of philosophy", "historicn of philosophy", "historiansn of philosophy", "historiesn of philosophy"
"historia of philosophy" » "historic of philosophy", "historians of philosophy", "histories of philosophy"

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: (("historian of philosophy") OR ((("historia of philosophy") OR ("historical of philosophy")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"historian of philosophy\") or (((\"historia of philosophy\") OR (\"historical of philosophy\"))))".
• Removing quotes may allow a broader search: (( historian of philosophy ) or ((( historia of philosophy ) OR ( historical of philosophy )))).
• Adding a wildcard symbol may retrieve word variants: (("historian of philosophy") or ((("historia of philosophy") OR ("historical of philosophy"))))*.