Perhaps you should try some spelling variations:
"supply fare integrationstheorie 2." » "supply der integrationstheorie 2.", "supply eine integrationstheorie 2.", "supply fare integrationstheorie fur.", "supply fare integration theories.", "supply fare interpretationstheorie 2.", "supply farm integrationstheorie 2.", "supply case integrationstheorie 2.", "supply figure integrationstheorie 2."
"supply factor integrating services." » "supply factor integration services.", "supply factor integrated services.", "supply factor regulating services.", "supply facto integration services.", "supply faso integrating services.", "supply factors integrating services.", "supply sector integrating services."

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("supply fare integrationstheorie 2.") or ("supply factor integrating services."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply fare integrationstheorie 2.") OR ("supply factor integrating services.")).
• Removing quotes may allow a broader search: (( supply fare integrationstheorie 2. ) or ( supply factor integrating services. )).
• Adding a wildcard symbol may retrieve word variants: (("supply fare integrationstheorie 2.") or ("supply factor integrating services."))*.