Perhaps you should try some spelling variations:
integration volume » integration policy
irrigation schemes » irrigation scheme, irrigation systems
costs integration » south integration, systems integration, content integration
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 costs integration volume. ) or ( supply canal irrigation schemes. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( supply costs integration volume. ) OR ( supply canal irrigation schemes. )).
• Adding a wildcard symbol may retrieve word variants: (( supply costs integration volume. ) or ( supply canal irrigation schemes. ))*.