Perhaps you should try some spelling variations:
international efforts » international airports, international energy, international airport
chains international » chaos international, changing international, china's international
curve irrigation » surge irrigation, large irrigation, crop irrigation
supply chains » supply chain
systems. » system.

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

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