Perhaps you should try some spelling variations:
"supply spate irrigation schemes." » "supply spate irrigation scheme.", "supply scale irrigation schemes.", "supply water irrigation schemes.", "supply surface irrigation schemes.", "supply system irrigation schemes.", "supply side irrigation schemes."
"Supply data irrigation systems." » "Supply canal irrigation systems.", "Supply water irrigation systems.", "Supply total irrigation systems.", "Supply data irrigation system."
supply data » supply water

Try widening your search to All Fields.

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

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