Perhaps you should try some spelling variations:
"modern historians" » "modern histories", "eastern historians", "modern history"
"modern austrian" » "modern industrial"
"power austria" » "power australia", "lower austrian", "poor austria"

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: (((("power austria") OR ("lower austria"))) OR ((("modern austrian") OR ("modern historians")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"power austria\") OR (\"lower austria\"))) or (((\"modern austrian\") or (\"modern historians\"))))".
• Removing quotes may allow a broader search: (((( power austria ) OR ( lower austria ))) or ((( modern austrian ) or ( modern historians )))).
• Adding a wildcard symbol may retrieve word variants: (((("power austria") OR ("lower austria"))) or ((("modern austrian") or ("modern historians"))))*.