Perhaps you should try some spelling variations:
"supply how integration policies." » "supply how immigration policies.", "supply how international policies.", "supply how innovation policies.", "supply power integration policies.", "supply tool integration policies.", "supply _ integration policies.", "supply shock 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 how integration policies.") or ("supply trade migration policies."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply how integration policies.") OR ("supply trade migration policies.")).
• Removing quotes may allow a broader search: (( supply how integration policies. ) or ( supply trade migration policies. )).
• Adding a wildcard symbol may retrieve word variants: (("supply how integration policies.") or ("supply trade migration policies."))*.