Perhaps you should try some spelling variations:
international efforts » international airports, international energy, international airport
integration social » international social
can international » main international, oman international, den international
fruhe integration » trade integration, fare integration, re integration
supply fruhe » supply figure, supply from
supply can » supply chain, supply case, supply chai

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 can international efforts. ) OR ( supply fruhe integration social. ))~.
• Adding a wildcard symbol may retrieve word variants: (( supply can international efforts. ) or ( supply fruhe integration social. ))*.