Perhaps you should try some spelling variations:
irrigation schemes » irrigation scheme, irrigation systems
south integration » through integration, social integration, sector integration
integration some » integration volume, integration power, integration south
canal irrigation » scale irrigation
supply south » supply growth, supply costs, supply cost
supply canal » supply annual, supply rural, supply case

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

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