Perhaps you should try some spelling variations:
"supply under irrigation system." » "supply under irrigation systems.", "supply under irrigation water.", "supply water irrigation system.", "supply led irrigation system.", "supply order irrigation system.", "supply united irrigation system.", "supply siders irrigation system."
"supply basin irrigation scheme." » "supply basin irrigation systems.", "supply drip irrigation scheme.", "supply canal irrigation scheme.", "supply farm irrigation scheme.", "supply asia irrigation scheme.", "supply based irrigation scheme.", "supply design 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 basin irrigation scheme.") or ("supply under irrigation system."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply basin irrigation scheme.") OR ("supply under irrigation system.")).
• Removing quotes may allow a broader search: (( supply basin irrigation scheme. ) or ( supply under irrigation system. )).
• Adding a wildcard symbol may retrieve word variants: (("supply basin irrigation scheme.") or ("supply under irrigation system."))*.