Perhaps you should try some spelling variations:
"historian" » "historians", "historia"
"historien" » "historie", "historians", "historiker"
"historikerin" » "historiker", "historikers"
"historikern" » "historiker"

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 (("histories" OR "historien") OR ("historikerin" OR "historikern"))) OR ("historical" OR "historic")).
• Removing quotes may allow a broader search: (( historian or (( histories or historien ) or ( historikerin or historikern ))) or ( historical or historic )).
• Adding a wildcard symbol may retrieve word variants: (("historian" or (("histories" or "historien") or ("historikerin" or "historikern"))) or ("historical" or "historic"))*.