Perhaps you should try some spelling variations:
"historian" » "historia", "histories", "historic"
"historians" » "historias", "historiess", "historics", "histories"
"historiess" » "histories", "historiese", "historikers"
"historiens" » "histories", "historien", "historie"

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