Perhaps you should try some spelling variations:
integration theories » integration theory, integration through, integration efforts
urban integration » european integration, global integration, trade integration
integration some » integration volume, integration power, integration south
supply crowd » supply growth, supply cost
supply urban » supply rural
supply how » supply shock

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 crowd) OR (supply how)) integration theories. ) OR ( supply urban integration some. ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((supply crowd) OR (supply how)) integration theories. ) or ( supply urban integration some. ))~".
• Adding a wildcard symbol may retrieve word variants: (( ((supply crowd) OR (supply how)) integration theories. ) or ( supply urban integration some. ))*.