Perhaps you should try some spelling variations:
"supply cost immigration countries." » "supply cost immigration policies.", "supply gross immigration countries.", "supply first immigration countries.", "supply mass immigration countries.", "supply costs immigration countries."
"supply ocean conservation efforts." » "supply ocean observation efforts.", "supply local conservation efforts.", "supply area conservation efforts.", "supply chain conservation efforts.", "supply oecd conservation efforts.", "supply chai conservation 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: (("supply ocean conservation efforts.") OR ("supply cost immigration countries."))~.
• Removing quotes may allow a broader search: (( supply ocean conservation efforts. ) or ( supply cost immigration countries. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply ocean conservation efforts.") or ("supply cost immigration countries."))*.