Perhaps you should try some spelling variations:
"nationalen regional state" » "nationalen region state" (Expand Search)
"nationala regional stadt" » "nationala region stadt" (Expand Search), "nationaler regional stadt" (Expand Search)
"nationale regional stadt" » "nationale region stadt" (Expand Search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("nationalen regional state") OR ((("nationala regional stadt") OR ("nationale regional stadt"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"nationalen regional state\") OR (((\"nationala regional stadt\") OR (\"nationale regional stadt\"))))".
• Removing quotes may allow a broader search: (( nationalen regional state ) OR ((( nationala regional stadt ) OR ( nationale regional stadt )))).
• Adding a wildcard symbol may retrieve word variants: (("nationalen regional state") OR ((("nationala regional stadt") OR ("nationale regional stadt"))))*.