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 chain's irrigation scheme." » "supply change irrigation scheme.", "supply canal irrigation scheme.", "supply grain irrigation scheme.", "supply chain's irrigation systems.", "supply chains irrigation scheme.", "supply channels irrigation scheme.", "supply china irrigation scheme."

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 chain's irrigation scheme."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply trade integrationstheorie 2.") OR ("supply chain's irrigation scheme."))*.
• Removing quotes may allow a broader search: (( supply trade integrationstheorie 2. ) or ( supply chain's irrigation scheme. ))*.