Perhaps you should try some spelling variations:
"supply large irrigation scheme." » "supply large irrigation systems.", "supply farm irrigation scheme.", "supply drip irrigation scheme.", "supply scale irrigation scheme.", "supply charges irrigation scheme.", "supply targets irrigation scheme.", "supply curve irrigation scheme."
"supply china testing services." » "supply china existing services.", "supply china lending services.", "supply china training services.", "supply china getting services.", "supply china meeting services.", "supply china investing services.", "supply chains testing services.", "supply chain 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 large irrigation scheme.") OR ("supply china testing services."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"supply large irrigation scheme.\") OR (\"supply china testing services.\"))".
• Removing quotes may allow a broader search: (( supply large irrigation scheme. ) OR ( supply china testing services. )).
• Adding a wildcard symbol may retrieve word variants: (("supply large irrigation scheme.") OR ("supply china testing services."))*.