Perhaps you should try some spelling variations:
"nationaler regional state" » "nationale regional state" (Expand Search), "nationalen regional state" (Expand Search), "nationaleer regional state" (Expand Search), "nationalener regional state" (Expand Search), "nationaleser regional state" (Expand Search), "nationaler religional state" (Expand Search)
"nationala regional state" » "nationale regional state" (Expand Search), "nationalen regional state" (Expand Search), "nationalea regional state" (Expand Search), "nationalena regional state" (Expand Search), "nationalesa regional state" (Expand Search), "nationala religional state" (Expand Search)
"national region stadte" » "nationale region stadte" (Expand Search), "nationalen region stadte" (Expand Search), "nationales region stadte" (Expand Search), "national religion stadte" (Expand Search), "national 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: "((((\"nationaler regional state\") OR (\"nationala regional state\"))) OR (\"national region stadte\"))~".
• Removing quotes may allow a broader search: (((( nationaler regional state ) OR ( nationala regional state ))) OR ( national region stadte ))~.
• Adding a wildcard symbol may retrieve word variants: (((("nationaler regional state") OR ("nationala regional state"))) OR ("national region stadte"))*.