Perhaps you should try some spelling variations:
"supply side interpretationstheorie 2." » "supply eine integrationstheorie 2.", "supply side integrationstheorie 2.", "supply side interpretation series."
"supply congo integrated policies." » "supply congo integration policies.", "supply congo integrating policies.", "supply congo integrated policy.", "supply change integrated policies.", "supply non integrated policies.", "supply costs integrated policies.", "supply cost integrated policies.", "supply cold integrated policies."

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: (("supply congo integrated policies.") OR ("supply side interpretationstheorie 2."))~.
• Removing quotes may allow a broader search: (( supply congo integrated policies. ) or ( supply side interpretationstheorie 2. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply congo integrated policies.") or ("supply side interpretationstheorie 2."))*.