Perhaps you should try some spelling variations:
"supply anti immigration policies." » "supply anti immigration policy.", "supply anti migration policy.", "supply net immigration policies.", "supply _ immigration policies.", "supply mass immigration policies.", "supply ann immigration policies."
"supply crowd integrating policies." » "supply crowd integration policies.", "supply crowd integrated policies.", "supply crowd integrating positive.", "supply from integrating policies.", "supply now integrating policies.", "supply toward integrating policies.", "supply growth integrating policies.", "supply cost integrating policies."

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 anti immigration policies.") OR ("supply crowd integrating policies."))~.
• Removing quotes may allow a broader search: (( supply anti immigration policies. ) or ( supply crowd integrating policies. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply anti immigration policies.") or ("supply crowd integrating policies."))*.