Perhaps you should try some spelling variations:
integration theories » integration theory, integration through, integration efforts
irrigation scheme » irrigation systems
canal irrigation » scale irrigation
grid integration » trade integration, _ integration, data integration
supply canal » supply annual, supply rural, supply case
supply grid » supply crowd, support grid

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 canal irrigation scheme. ) OR ( supply grid integration theories. ))~.
• Adding a wildcard symbol may retrieve word variants: (( supply canal irrigation scheme. ) or ( supply grid integration theories. ))*.