Perhaps you should try some spelling variations:
irrigation schemes » irrigation scheme, irrigation systems
large irrigation » farm irrigation, drip irrigation, scale irrigation
south innovation » growth innovation, cost innovation, costs innovation
supply large » supply charges, supply targets, supply curve
supply south » supply southern, supply costs, supply cost

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( supply large irrigation schemes. ) or ( supply south innovation through. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( supply large irrigation schemes. ) OR ( supply south innovation through. )).
• Adding a wildcard symbol may retrieve word variants: (( supply large irrigation schemes. ) or ( supply south innovation through. ))*.