Perhaps you should try some spelling variations:
"export data irrigation schemes." » "export data irrigation scheme.", "export data irrigation systems.", "export canal irrigation schemes.", "export water irrigation schemes.", "export spate irrigation schemes.", "export day irrigation schemes.", "import data irrigation schemes.", "export ratio 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 side irrigation system.", "supply sides irrigation system."

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("supply under irrigation system.") or ("export data irrigation schemes."))~.
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