Perhaps you should try some spelling variations:
integration theories » integration theory, integration through, integration efforts
irrigation schemes » irrigation scheme, irrigation systems
urban integration » european integration, global integration, trade integration
supply scale » supply case, supply scheme, supply social
supply urban » supply rural

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