Perhaps you should try some spelling variations:
irrigation system » irrigation systems, irrigation water, irrigation scheme
grid integration » trade integration, data integration
grid irrigation » drip irrigation, syria irrigation, crop irrigation
_ integration » _ integrated
supply grid » supply crowd, support grid

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 irrigation system. ) or ( supply ((grid integration) OR (_ integration)) efforts. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( supply grid irrigation system. ) OR ( supply ((grid integration) OR (_ integration)) efforts. )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( supply grid irrigation system. ) or ( supply ((grid integration) OR (_ integration)) efforts. ))".
• Adding a wildcard symbol may retrieve word variants: (( supply grid irrigation system. ) or ( supply ((grid integration) OR (_ integration)) efforts. ))*.