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

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