Perhaps you should try some spelling variations:
international efforts » international airports, international energy, international airport
integration theory » integration through, information theory, innovation theory
grid international » 3rd international, third international, build international
supply grid » supply crowd, supply great, support grid

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

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