Perhaps you should try some spelling variations:
"supply chain international efforts." » "supply chain international airports.", "supply chain international energy.", "supply chain international airport.", "supply chains international efforts.", "supply main international efforts.", "supply can international efforts."
"supply china irrigation schemes." » "supply china irrigation scheme.", "supply china irrigation systems.", "supply change irrigation schemes.", "supply canal irrigation schemes.", "supply high irrigation schemes.", "supply chains irrigation schemes."

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 china irrigation schemes.") OR ("supply chain international efforts."))~.
• Removing quotes may allow a broader search: (( supply china irrigation schemes. ) or ( supply chain international efforts. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply china irrigation schemes.") or ("supply chain international efforts."))*.