Perhaps you should try some spelling variations:
"supply rate international political." » "supply rate international policy.", "supply rates international political.", "supply trade international political.", "supply raise international political.", "supply water international political.", "supply case international political."
"supply worker migration policies." » "supply worker immigration policies.", "supply worker migration policy.", "supply worker education policies.", "supply border migration policies.", "supply world migration policies.", "supply der migration policies.", "support worker migration policies.", "supply water migration policies.", "supply market migration policies."

Try widening your search to All Fields.

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

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