Perhaps you should try some spelling variations:
"supply under irrigation schemes." » "supply under irrigation scheme.", "supply under irrigation systems.", "supply water irrigation schemes.", "supply led irrigation schemes.", "supply order irrigation schemes.", "supply united irrigation schemes.", "supply siders irrigation schemes."
"supply large irrigation schemes." » "supply large irrigation scheme.", "supply large irrigation systems.", "supply farm irrigation schemes.", "supply drip irrigation schemes.", "supply scale irrigation schemes.", "supply charges irrigation schemes.", "supply targets irrigation schemes.", "supply curve irrigation schemes."

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

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