Perhaps you should try some spelling variations:
"supply mass immigration policies." » "supply mass immigration policy.", "supply mass migration policy.", "supply mass migration policies.", "supply _ immigration policies.", "supply case immigration policies.", "supply main immigration policies.", "supply many immigration policies."
"supply grid integration efforts." » "supply grid international efforts.", "supply grid conservation efforts.", "supply crowd integration efforts.", "supply great integration efforts.", "support grid 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: (("supply mass immigration policies.") or ("supply grid integration efforts."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply mass immigration policies.") OR ("supply grid integration efforts.")).
• Removing quotes may allow a broader search: (( supply mass immigration policies. ) or ( supply grid integration efforts. )).
• Adding a wildcard symbol may retrieve word variants: (("supply mass immigration policies.") or ("supply grid integration efforts."))*.