Perhaps you should try some spelling variations:
integration theories » integration theorems, integrationstheorie 2, integration theory
creation efforts » creation effects, cessation efforts, prevention efforts
cost integration » post integration, test integration, about integration
trade creation » trade regulation, trade protection
supply trade » supply case
supply cost » supply costs

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 trade creation efforts. ) OR ( supply cost integration theories. ))~.
• Adding a wildcard symbol may retrieve word variants: (( supply trade creation efforts. ) or ( supply cost integration theories. ))*.