Perhaps you should try some spelling variations:
"supply chain integrationstheorie 2." » "supply eine integrationstheorie 2.", "supply der integrationstheorie 2.", "supply chain integrationstheorie fur.", "supply chain integration theories.", "supply chain interpretationstheorie 2."
"supply grid international airshow." » "supply 3rd international airshow.", "supply third international airshow.", "supply build international airshow.", "supply crowd international airshow.", "supply great international airshow.", "support grid international airshow."

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

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