Perhaps you should try some spelling variations:
"Supply change irrigation schemes." » "Supply change irrigation systems.", "Supply change mitigation schemes.", "Supply canal irrigation schemes.", "Supply large irrigation schemes.", "Supply change irrigation systemss."
"Supply change irrigation scheme." » "Supply change mitigation scheme.", "Supply canal irrigation scheme.", "Supply large irrigation scheme.", "Supply change irrigation systems."
supply change » supply charges, supply channels, supply chain's

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 schemes.") OR ("Supply change irrigation scheme."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"Supply change irrigation schemes.\") OR (\"Supply change irrigation scheme.\"))".
• Removing quotes may allow a broader search: (( Supply change irrigation schemes. ) OR ( Supply change irrigation scheme. )).
• Adding a wildcard symbol may retrieve word variants: (("Supply change irrigation schemes.") OR ("Supply change irrigation scheme."))*.