Perhaps you should try some spelling variations:
"supply grid interpretationstheorie 2." » "supply grid integrationstheorie 2.", "supply grid interpretation series.", "supply crowd interpretationstheorie 2.", "supply great interpretationstheorie 2.", "support grid interpretationstheorie 2."
"supply chain irrigation system." » "supply chain irrigation systems.", "supply chain irrigation water.", "supply chain irrigation scheme.", "supply grain irrigation system.", "supply change irrigation system.", "supply basin irrigation system."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("supply grid interpretationstheorie 2.") or ("supply chain irrigation system."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply grid interpretationstheorie 2.") OR ("supply chain irrigation system."))*.
• Removing quotes may allow a broader search: (( supply grid interpretationstheorie 2. ) or ( supply chain irrigation system. ))*.