Perhaps you should try some spelling variations:
"supply trade integration theories." » "supply trade integration theorems.", "supply trade integrationstheorie 2.", "supply trade integration theory.", "supply case integration theories."
"supply basin irrigation system." » "supply basin irrigation systems.", "supply basin irrigation water.", "supply basin irrigation scheme.", "supply drip irrigation system.", "supply canal irrigation system.", "supply farm irrigation system.", "supply asia irrigation system.", "supply based irrigation system.", "supply design 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 integration theories.") or ("supply basin irrigation system."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply trade integration theories.") OR ("supply basin irrigation system.")).
• Removing quotes may allow a broader search: (( supply trade integration theories. ) or ( supply basin irrigation system. )).
• Adding a wildcard symbol may retrieve word variants: (("supply trade integration theories.") or ("supply basin irrigation system."))*.