Perhaps you should try some spelling variations:
international efforts » international airports, international energy, international airport
trade international » care international, private international, states international
mass immigration » mass migration, _ immigration
supply trade » supply side, supply case
supply mass » supply case, supply costs, supply asset

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( supply trade international efforts. ) or ( supply mass immigration reform. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( supply trade international efforts. ) OR ( supply mass immigration reform. )).
• Adding a wildcard symbol may retrieve word variants: (( supply trade international efforts. ) or ( supply mass immigration reform. ))*.