Perhaps you should try some spelling variations:
"supply trade integrationstheorie 2." » "supply der integrationstheorie 2.", "supply eine integrationstheorie 2.", "supply traditionelle integrationstheorie 2.", "supply trade integrationstheorie fur.", "supply trade integration theories.", "supply trade interpretationstheorie 2.", "supply case integrationstheorie 2."
"supply crowd irrigation systems." » "supply crop irrigation systems.", "supply flood irrigation systems.", "supply from irrigation systems.", "supply growth irrigation systems.", "supply cost irrigation systems.", "supply crowd 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 trade integrationstheorie 2.") or ("supply crowd irrigation systems."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply trade integrationstheorie 2.") OR ("supply crowd irrigation systems."))*.
• Removing quotes may allow a broader search: (( supply trade integrationstheorie 2. ) or ( supply crowd irrigation systems. ))*.