Perhaps you should try some spelling variations:
"historian" » "historia", "historical", "historic"
"historians" » "historias", "historicals", "historics"
"historics" » "historicos", "historicis", "historic"
"historicas" » "historical", "historica", "historicos"
"historiess" » "historiens", "historiese", "historiassa"
"historikers" » "historiker", "historikern"

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