Perhaps you should try some spelling variations:
"support gross immigration policies." » "support gross immigration policy.", "support gross migration policy.", "support gross emigration policies.", "support mass immigration policies.", "support from immigration policies.", "support cross immigration policies.", "support across immigration policies.", "support groups immigration policies."
"supply european integration efforts." » "supply european international efforts.", "supply european conservation efforts.", "supply europe integration efforts.", "survey european integration efforts."

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: (("support gross immigration policies.") OR ("supply european integration efforts."))~.
• Removing quotes may allow a broader search: (( support gross immigration policies. ) or ( supply european integration efforts. ))~.
• Adding a wildcard symbol may retrieve word variants: (("support gross immigration policies.") or ("supply european integration efforts."))*.