Perhaps you should try some spelling variations:
international efforts » international airports, international energy, international airport
europe international » crop international, improve international, restore international
integration some » integration south, integration soziale, integration social
supply europe » supply curve
support trade » support trainer, export trade, import trade

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

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