Perhaps you should try some spelling variations:
international efforts » international airports, international energy, international airport
integration theory » integration through, information theory, innovation theory
care international » commerce international, finance international, private international
supply grid » supply crowd, supply great, support grid
supply care » supply case, supply curve, supply cote

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 grid integration theory. ) OR ( supply care international efforts. ))~.
• Adding a wildcard symbol may retrieve word variants: (( supply grid integration theory. ) or ( supply care international efforts. ))*.