Perhaps you should try some spelling variations:
die integrationstheorie » eine integrationstheorie, der integrationstheorie, die generationstheorie
integrationstheorie 2 » integrationstheorie fur, integration theories, interpretationstheorie 2
internet services » internet service
2.3 internet » 6.3 internet, 1.3 internet, 2.1 internet
supply 2.3 » supply 1.3, supply 3.3, supply 5.3
supply die » supply driven

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 2.3 internet services. ) OR ( supply die integrationstheorie 2. ))~.
• Adding a wildcard symbol may retrieve word variants: (( supply 2.3 internet services. ) or ( supply die integrationstheorie 2. ))*.