Perhaps you should try some spelling variations:
from integrationstheorie » der integrationstheorie, eine integrationstheorie
integrationstheorie 2 » integrationstheorie fur, integration theories, interpretationstheorie 2
valuing services » banking services, making services, warning services
support round » support young, support groups, support group
round valuing » round walking, counted valuing, round banking

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( support from integrationstheorie 2. ) or ( support round valuing services. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( support from integrationstheorie 2. ) OR ( support round valuing services. )).
• Adding a wildcard symbol may retrieve word variants: (( support from integrationstheorie 2. ) or ( support round valuing services. ))*.