Perhaps you should try some spelling variations:
international efforts » international airports, international energy, international airport
chains international » chaos international, changing international, china's international
integration theory » integration through, information theory, innovation theory
side integration » die integration, de integration, life integration
supply chains » supply chain

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( supply side integration theory. ) OR ( supply chains international efforts. ))~.
• Adding a wildcard symbol may retrieve word variants: (( supply side integration theory. ) or ( supply chains international efforts. ))*.