Perhaps you should try some spelling variations:
"supply china international airports." » "supply china international airport.", "supply china international transport.", "supply china international airshow.", "supply chains international airports."
"supply chain integration schemes." » "supply chain irrigation schemes.", "supply chain integration some.", "supply chain integration theories.", "supply trade integration schemes.", "supply data integration schemes.", "supply grid integration 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 chain integration schemes.") OR ("supply china international airports."))~.
• Removing quotes may allow a broader search: (( supply chain integration schemes. ) or ( supply china international airports. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply chain integration schemes.") or ("supply china international airports."))*.