Perhaps you should try some spelling variations:
curve irrigation » large irrigation, surface irrigation, furrow irrigation
grid integration » trade integration, _ integration, data integration
integration some » integration volume, integration power, integration south
crop irrigation » drip irrigation, scale irrigation, canal irrigation
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 ((curve irrigation) OR (crop irrigation)) scheme. ) or ( supply grid integration some. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( supply ((curve irrigation) OR (crop irrigation)) scheme. ) OR ( supply grid integration some. )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( supply ((curve irrigation) OR (crop irrigation)) scheme. ) or ( supply grid integration some. ))".
• Adding a wildcard symbol may retrieve word variants: (( supply ((curve irrigation) OR (crop irrigation)) scheme. ) or ( supply grid integration some. ))*.