Perhaps you should try some spelling variations:
irrigation system » irrigation systems, irrigation water, irrigation scheme
innovation report » innovation support
trip irrigation » drip irrigation, crop irrigation, grain irrigation
supply firm » supply from, supplier firm, supply figure
supply farm » supply from, support farm
supply trip » supply tariff, supply trade

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

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