Perhaps you should try some spelling variations:
integrating theory » integration theory
irrigation schemes » irrigation scheme, irrigation systems
water integrating » water integrated, market integrating, gaps integrating
canal irrigation » scale irrigation
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 water integrating theory. ) or ( supply canal irrigation schemes. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( supply water integrating theory. ) OR ( supply canal irrigation schemes. )).
• Adding a wildcard symbol may retrieve word variants: (( supply water integrating theory. ) or ( supply canal irrigation schemes. ))*.