Perhaps you should try some spelling variations:
"supply china integrating policies." » "supply china international policies.", "supply china integrating countries.", "supply china immigration policies.", "supply china integration policies.", "supply china integrated policies.", "supply count integrating policies.", "supply chains integrating policies."
"supply chain irrigation schemes." » "supply chain irrigation scheme.", "supply chain irrigation systems.", "supply change irrigation schemes.", "supply basin irrigation schemes.", "supply chain integration schemes."

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 integrating policies.") or ("supply chain irrigation schemes."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply china integrating policies.") OR ("supply chain irrigation schemes.")).
• Removing quotes may allow a broader search: (( supply china integrating policies. ) or ( supply chain irrigation schemes. )).
• Adding a wildcard symbol may retrieve word variants: (("supply china integrating policies.") or ("supply chain irrigation schemes."))*.