Perhaps you should try some spelling variations:
"supply grid integrationstheorie 2." » "supply der integrationstheorie 2.", "supply eine integrationstheorie 2.", "supply grid integrationstheorie fur.", "supply grid integration theories.", "supply grid interpretationstheorie 2.", "supply crowd integrationstheorie 2.", "supply great integrationstheorie 2.", "support grid integrationstheorie 2."
"supply pipes integrating policies." » "supply pipes integration policies.", "supply pipes integrated policies.", "supply pipes integrating positive.", "supply cities integrating policies.", "supply gaps integrating policies.", "supply ims 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 pipes integrating policies.") or ("supply grid integrationstheorie 2."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply pipes integrating policies.") OR ("supply grid integrationstheorie 2.")).
• Removing quotes may allow a broader search: (( supply pipes integrating policies. ) or ( supply grid integrationstheorie 2. )).
• Adding a wildcard symbol may retrieve word variants: (("supply pipes integrating policies.") or ("supply grid integrationstheorie 2."))*.