Perhaps you should try some spelling variations:
"support data irrigation schemes." » "support data irrigation scheme.", "support data irrigation systems.", "support canal irrigation schemes.", "support water irrigation schemes.", "support spate irrigation schemes.", "import data irrigation schemes.", "support a irrigation schemes.", "export data 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."

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."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("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. ))*.