Perhaps you should try some spelling variations:
"supply canal irrigation schemes." » "supply canal irrigation scheme.", "supply canal irrigation systems.", "supply scale irrigation schemes.", "supply canada irrigation schemes.", "supply annual irrigation schemes.", "supply case irrigation schemes."
"supply china training services." » "supply china planning services.", "supply china banking services.", "supply using training services.", "supply ca training services.", "supply china liaoning services.", "supply chains training services.", "supply chain training 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 china training services.") or ("supply canal irrigation schemes."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply china training services.") OR ("supply canal irrigation schemes.")).
• Removing quotes may allow a broader search: (( supply china training services. ) or ( supply canal irrigation schemes. )).
• Adding a wildcard symbol may retrieve word variants: (("supply china training services.") or ("supply canal irrigation schemes."))*.