Perhaps you should try some spelling variations:
irrigation schemes » irrigation scheme, irrigation systems
integration some » integration south, integration soziale, integration social
canal irrigation » scale irrigation
supply south » supply southern, supply costs, supply southeast
supply canal » supply canada, supply annual, supply china
supply cost » supply costs

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 south) OR (supply cost)) integration some. ) OR ( supply canal irrigation schemes. ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((supply south) OR (supply cost)) integration some. ) or ( supply canal irrigation schemes. ))~".
• Adding a wildcard symbol may retrieve word variants: (( ((supply south) OR (supply cost)) integration some. ) or ( supply canal irrigation schemes. ))*.