Perhaps you should try some spelling variations:
"supply spate irrigation system." » "supply spate irrigation systems.", "supply spate irrigation water.", "supply scale irrigation system.", "supply water irrigation system.", "supply surge irrigation system.", "supply system irrigation system.", "supply side irrigation system."
"support agri irrigation scheme." » "support agri irrigation systems.", "support africa irrigation scheme.", "support grain irrigation scheme.", "support syria irrigation scheme.", "support grid irrigation scheme.", "support aging irrigation scheme.", "support a 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: (("support agri irrigation scheme.") OR ("supply spate irrigation system."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"support agri irrigation scheme.\") OR (\"supply spate irrigation system.\"))".
• Removing quotes may allow a broader search: (( support agri irrigation scheme. ) OR ( supply spate irrigation system. )).
• Adding a wildcard symbol may retrieve word variants: (("support agri irrigation scheme.") OR ("supply spate irrigation system."))*.