Perhaps you should try some spelling variations:
"support data irrigation schemes." » "support data irrigation scheme.", "support data irrigation systems.", "support delta irrigation schemes.", "support canal irrigation schemes.", "support water irrigation schemes.", "support a irrigation schemes.", "support de irrigation schemes."
"supply under irrigation system." » "supply under irrigation systems.", "supply under irrigation water.", "supply under irrigation scheme.", "supply water irrigation system.", "supply led irrigation system.", "supply order irrigation system.", "supply united irrigation system.", "supply siders irrigation system."

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