Perhaps you should try some spelling variations:
"supply large irrigation schemes." » "supply large irrigation scheme.", "supply large irrigation systems.", "supply farm irrigation schemes.", "supply drip irrigation schemes.", "supply scale irrigation schemes.", "supply charges irrigation schemes.", "supply targets irrigation schemes.", "supply curve irrigation schemes."
"supply side testing services." » "supply side existing services.", "supply side lending services.", "supply side training services.", "supply time testing services.", "supply fire testing services.", "supply life 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 side testing services.") OR ("supply large irrigation schemes."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"supply side testing services.\") OR (\"supply large irrigation schemes.\"))*".
• Removing quotes may allow a broader search: (( supply side testing services. ) OR ( supply large irrigation schemes. ))*.