Perhaps you should try some spelling variations:
"supply data integrationstheorie 2." » "supply der integrationstheorie 2.", "supply eine integrationstheorie 2.", "supply aa migrationstheorie 2.", "supply data integrationstheorie fur.", "supply data integration theories.", "supply data interpretationstheorie 2."
"supply prices international policy." » "supply prices internationally policy.", "supply process international policy.", "supply places international policy.", "supply prices international poverty.", "supply prices international prices.", "supply prices national policy.", "supply pipes international policy.", "supply services international policy."

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 data integrationstheorie 2.") OR ("supply prices international policy."))~.
• Removing quotes may allow a broader search: (( supply data integrationstheorie 2. ) or ( supply prices international policy. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply data integrationstheorie 2.") or ("supply prices international policy."))*.