Perhaps you should try some spelling variations:
international efforts » international airports, international energy, international airport
case international » cases international, care international, cause internationale
aid conservation » land conservation, bird conservation, wild conservation
supply case » supply cost, supply chain, supply curve
supply aid » supply asia, supply a, supply ann

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

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