Perhaps you should try some spelling variations:
"supply chain integration policies." » "supply chain immigration policies.", "supply chain international policies.", "supply chain innovation policies.", "supply trade integration policies.", "supply data integration policies.", "supply grid integration policies."
"supply trade migration policies." » "supply trade immigration policies.", "supply trade migration policy.", "supply trade education policies.", "supply male migration policies.", "supply scale migration policies.", "supply trade integration policies.", "supply side migration policies.", "supply case migration policies."

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("supply chain integration policies.") or ("supply trade migration policies."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply chain integration policies.") OR ("supply trade migration policies.")).
• Removing quotes may allow a broader search: (( supply chain integration policies. ) or ( supply trade migration policies. )).
• Adding a wildcard symbol may retrieve word variants: (("supply chain integration policies.") or ("supply trade migration policies."))*.