Perhaps you should try some spelling variations:
"supply chain irrigation schemes." » "supply chain irrigation scheme.", "supply chain irrigation systems.", "supply grain irrigation schemes.", "supply change irrigation schemes.", "supply basin irrigation schemes."
"supply crises mitigation system." » "supply risk mitigation system.", "supply cost mitigation system.", "supply its mitigation system.", "supply crises mitigation systems.", "supply crises irrigation system.", "supply crises navigation system.", "supply rise mitigation system.", "supply curves mitigation system.", "supply costs mitigation 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 chain irrigation schemes.") or ("supply crises mitigation system."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply chain irrigation schemes.") OR ("supply crises mitigation system."))*.
• Removing quotes may allow a broader search: (( supply chain irrigation schemes. ) or ( supply crises mitigation system. ))*.