Perhaps you should try some spelling variations:
"historikern" » "historiker"
"historie" » "histories", "historic"
"historian" » "historical", "histories", "historic", "historicn", "historicaln", "historiesn"
"historians" » "historicals", "historiess", "historics", "historicns", "historicalns", "historiesns", "histories"
"historia" » "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: (("historikern" OR ("historie" OR "historian")) OR ("historia" OR "historians")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"historikern\" or (\"historie\" OR \"historian\")) or (\"historia\" or \"historians\"))".
• Removing quotes may allow a broader search: (( historikern or ( historie OR historian )) or ( historia or historians )).
• Adding a wildcard symbol may retrieve word variants: (("historikern" or ("historie" OR "historian")) or ("historia" or "historians"))*.