Perhaps you should try some spelling variations:
irrigation schemes » irrigation scheme, irrigation systems
furrow irrigation » farm irrigation, crop irrigation, flood irrigation
cost innovation » costs innovation, foster innovation, cost information
supply furrow » supply from
supply cost » supply costs

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

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