Perhaps you should try some spelling variations:
"nationale region stadt" » "nationale din stadt" (Expand Search), "nationalae region stadt" (Expand Search), "nationalene region stadt" (Expand Search), "nationalere region stadt" (Expand Search)
"national regional state" » "nationala regional state" (Expand Search), "nationalen regional state" (Expand Search), "nationaler regional state" (Expand Search)
"nationalera region stadt" » "nationalaera region stadt" (Expand Search), "nationalenera region stadt" (Expand Search), "nationalerera region stadt" (Expand Search), "nationaler region stadt" (Expand Search), "nationalen region stadt" (Expand Search), "nationala region stadt" (Expand Search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"national regional state\") OR (((\"nationale region stadt\") OR (\"nationalera region stadt\"))))~".
• Removing quotes may allow a broader search: (( national regional state ) OR ((( nationale region stadt ) OR ( nationalera region stadt ))))~.
• Adding a wildcard symbol may retrieve word variants: (("national regional state") OR ((("nationale region stadt") OR ("nationalera region stadt"))))*.