Perhaps you should try some spelling variations:
integration theories » integration theorems, integrationstheorie 2, integration theory
integration social » international social
school integration » school reintegration, school integrating, school interactions
supply school » supplies school, support school, supply shock
supply grid » supply crowd, supply great, support grid

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

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