Perhaps you should try some spelling variations:
"support grid immigration policies." » "support grid immigration policy.", "support grid migration policy.", "support gross immigration policies.", "support grid integration policies.", "support from immigration policies.", "support agri immigration policies.", "support grant immigration policies.", "support group immigration policies."
"supply urban integration efforts." » "supply urban international efforts.", "supply urban conservation efforts.", "supply european integration efforts.", "supply global integration efforts.", "supply trade integration efforts.", "supply rural integration efforts."

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

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