Perhaps you should try some spelling variations:
integration efforts » international efforts, conservation efforts
grid integration » trade integration, _ integration, data integration
curve irrigation » large irrigation, crop irrigation, surface irrigation
supply grid » supply crowd, support grid
systems. » system.

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