Perhaps you should try some spelling variations:
irrigation schemes » irrigation scheme, irrigation systems
factor irrigation » water irrigation, factor integration, farm irrigation
supply factor » supply factors, supply sector, supply water
a integration » can integration, eu integration, data integration
_ integration » _ integrated

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( supply factor irrigation schemes. ) or ( support ((a integration) OR (_ integration)) series. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( supply factor irrigation schemes. ) OR ( support ((a integration) OR (_ integration)) series. )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( supply factor irrigation schemes. ) or ( support ((a integration) OR (_ integration)) series. ))".
• Adding a wildcard symbol may retrieve word variants: (( supply factor irrigation schemes. ) or ( support ((a integration) OR (_ integration)) series. ))*.