Perhaps you should try some spelling variations:
eine integrationstheorie » der integrationstheorie, revidierte integrationstheorie, die generationstheorie
integrationstheorie 2 » integrationstheorie fur, integration theories, interpretationstheorie 2
integration social » international social
4 integration » 3 integration, 2 integration, 4.1 integration
supply eine » supply lines, supply china
support 4 » support _, support a, support 3.4

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: (( support 4 integration social. ) OR ( supply eine integrationstheorie 2. ))~.
• Adding a wildcard symbol may retrieve word variants: (( support 4 integration social. ) or ( supply eine integrationstheorie 2. ))*.