Perhaps you should try some spelling variations:
"supply spate irrigation system." » "supply spate irrigation systems.", "supply spate irrigation water.", "supply spate irrigation scheme.", "supply scale irrigation system.", "supply water irrigation system.", "supply surge irrigation system.", "supply system irrigation system.", "supply side irrigation system."
"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.

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