Perhaps you should try some spelling variations:
"supply crowd integrationstheorie 2." » "supply der integrationstheorie 2.", "supply eine integrationstheorie 2.", "supply crowd integrationstheorie fur.", "supply crowd integration theories.", "supply crowd interpretationstheorie 2.", "supply growth integrationstheorie 2.", "supply cost integrationstheorie 2.", "supply from integrationstheorie 2."
"supply gaps integrating policies." » "supply gaps integration policies.", "supply gaps integrated policies.", "supply gaps integrating positive.", "supply _ integrating policies.", "supply 4 integrating policies.", "supply 6 integrating policies.", "supply gap integrating policies.", "supply gas integrating policies."

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 crowd integrationstheorie 2.") or ("supply gaps integrating policies."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply crowd integrationstheorie 2.") OR ("supply gaps integrating policies.")).
• Removing quotes may allow a broader search: (( supply crowd integrationstheorie 2. ) or ( supply gaps integrating policies. )).
• Adding a wildcard symbol may retrieve word variants: (("supply crowd integrationstheorie 2.") or ("supply gaps integrating policies."))*.