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."
"support firms integration social." » "support firms international social.", "support dis integration social.", "support res integration social.", "support focus integration social.", "support farm integration social.", "supporting firms integration social.", "support farmers integration social."

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 ("support firms integration social."))~.
• Removing quotes may allow a broader search: (( supply data integrationstheorie 2. ) or ( support firms integration social. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply data integrationstheorie 2.") or ("support firms integration social."))*.