Perhaps you should try some spelling variations:
irrigation schemes » irrigation scheme, irrigation systems
balkan integration » asian integration, asean integration, urban integration
integration some » integration south, integration soziale, integration social
case irrigation » scale irrigation, use irrigation, change irrigation
supply case » supply cost, supply chain, supply curve

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

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