Perhaps you should try some spelling variations:
"supply spate irrigation schemes." » "supply spate irrigation scheme.", "supply spate irrigation systems.", "supply scale irrigation schemes.", "supply water irrigation schemes.", "supply surge irrigation schemes.", "supply system irrigation schemes.", "supply side irrigation schemes."
"supply trade testing services." » "supply trade existing services.", "supply trade lending services.", "supply trade training services.", "supply true testing services.", "supply trade creating services.", "supply scale testing services.", "supply case testing services."

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("supply trade testing services.") OR ("supply spate irrigation schemes."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"supply trade testing services.\") OR (\"supply spate irrigation schemes.\"))*".
• Removing quotes may allow a broader search: (( supply trade testing services. ) OR ( supply spate irrigation schemes. ))*.