Perhaps you should try some spelling variations:
integration theories » integration theory, integration through, integration efforts
global integration » regional integration
irrigation scheme » irrigation systems
crowd irrigation » crop irrigation, flood irrigation, from irrigation
supply crowd » supply growth, supply cost, supply how

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( supply crowd irrigation scheme. ) or ( supply global integration theories. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( supply crowd irrigation scheme. ) OR ( supply global integration theories. )).
• Adding a wildcard symbol may retrieve word variants: (( supply crowd irrigation scheme. ) or ( supply global integration theories. ))*.