Perhaps you should try some spelling variations:
international efforts » international airports, international energy, international airport
grid international » 3rd international, third international, build international
integration power » integrative power, integration process, international power
eu integration » deep integration, die integration, data integration
supply grid » supply crowd, supply great, support grid
support eu » support _, support a, support 4

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

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