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 surface irrigation schemes.", "supply system irrigation schemes.", "supply side irrigation schemes."
"supply trade testing services." » "supply trade lending services.", "supply trade training services.", "supply trade banking services.", "supply trade creating services.", "supply load testing services.", "supply trade trading services.", "supply side testing services.", "supply case testing services."

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("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. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply trade testing services.") or ("supply spate irrigation schemes."))*.