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 case testing services." » "supply case existing services.", "supply case lending services.", "supply case training services.", "supply cases testing services.", "supply care testing services.", "supply based testing services.", "supply cost testing services.", "supply chain testing services.", "supply curve testing services."

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"supply case testing services.\") OR (\"supply spate irrigation schemes.\"))~".
• Removing quotes may allow a broader search: (( supply case testing services. ) OR ( supply spate irrigation schemes. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply case testing services.") OR ("supply spate irrigation schemes."))*.