Perhaps you should try some spelling variations:
integration theories » integration theory, integration through, integration efforts
integration schemes » irrigation schemes, integration some
water integration » water integrating, factor integration, data integration
side integration » trade integration, asian integration, grid integration

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 side integration theories. ) OR ( supply water integration schemes. ))~.
• Adding a wildcard symbol may retrieve word variants: (( supply side integration theories. ) or ( supply water integration schemes. ))*.