Perhaps you should try some spelling variations:
integration schemes » integration some, integration theories
irrigation schemes » irrigation scheme, irrigation systems
urban integration » european integration, global integration, trade integration
spate irrigation » scale irrigation, water irrigation, surface irrigation
supply spate » supply system, supply side, supply water
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 spate irrigation schemes. ) OR ( supply urban integration schemes. ))~.
• Adding a wildcard symbol may retrieve word variants: (( supply spate irrigation schemes. ) or ( supply urban integration schemes. ))*.