Perhaps you should try some spelling variations:
"supply change irrigation scheme." » "supply change mitigation scheme.", "supply canal irrigation scheme.", "supply large irrigation scheme.", "supply change irrigation systems.", "supply charges irrigation scheme.", "supply channels irrigation scheme.", "supply chain's irrigation scheme."
"supply crises creating services." » "supply crises creating service.", "supply crises creative services.", "supply crises heating services.", "supply circles creating services.", "supply cities creating services.", "supply class creating services.", "supply rise creating services.", "supply curves creating services.", "supply costs creating services."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("supply change irrigation scheme.") or ("supply crises creating services."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply change irrigation scheme.") OR ("supply crises creating services.")).
• Removing quotes may allow a broader search: (( supply change irrigation scheme. ) or ( supply crises creating services. )).
• Adding a wildcard symbol may retrieve word variants: (("supply change irrigation scheme.") or ("supply crises creating services."))*.