Perhaps you should try some spelling variations:
"historian" » "historia", "historical", "histories"
"historians" » "historias", "historicals", "historiess", "histories"
"historiens" » "histories", "historie", "historicos", "historiess", "historikerns"
"historien" » "histories", "historie", "historikern"
"historic" » "historical", "histories"

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