Perhaps you should try some spelling variations:
gap integrationstheorie » der integrationstheorie, eine integrationstheorie
integrationstheorie 2 » integrationstheorie fur, integration theories, interpretationstheorie 2
integration theory » integration through, information theory, innovation theory
et integration » et l'integration, test integration, text integration
supply gap » supply a
supply et » supply _, supply a, supply 3

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 gap integrationstheorie 2. ) OR ( supply et integration theory. ))~.
• Adding a wildcard symbol may retrieve word variants: (( supply gap integrationstheorie 2. ) or ( supply et integration theory. ))*.