Perhaps you should try some spelling variations:
"supply european conservation efforts." » "supply european cooperation efforts.", "supply european construction efforts.", "supply european concentration efforts.", "supply europe conservation efforts.", "survey european conservation efforts."
"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."

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