Perhaps you should try some spelling variations:
"supply side integrationstheorie 2." » "supply eine integrationstheorie 2.", "supply der integrationstheorie 2.", "supply revidierte integrationstheorie 2.", "supply side integrationstheorie fur.", "supply side integration theories.", "supply side interpretationstheorie 2."
"supply economy integrating policies." » "supply economy integration policies.", "supply economy integrated policies.", "supply economy integrating positive.", "supply economic integrations policies.", "supply economic integration policies.", "supply economy international policies.", "supply economic integrating policies.", "poppy economy integrating 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 economy integrating policies.") OR ("supply side integrationstheorie 2."))~.
• Removing quotes may allow a broader search: (( supply economy integrating policies. ) or ( supply side integrationstheorie 2. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply economy integrating policies.") or ("supply side integrationstheorie 2."))*.