Perhaps you should try some spelling variations:
"historian" » "historia", "histories", "historic"
"historians" » "historias", "historiess", "historics", "histories"
"historicas" » "historica", "historias", "historicism"
"historicos" » "historico", "histories", "historic"

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