Perhaps you should try some spelling variations:
"supply scheme irrigation schemes." » "supply scheme irrigation systems.", "supply scale irrigation schemes.", "supply systems irrigation schemes.", "supply saline irrigation schemes.", "supply scheme irrigation systemss."
"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."

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

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