Perhaps you should try some spelling variations:
developing concepts » development concepts, development concept, developing countries
face communication » voice communication, de communication, time communication
concepts assessed » contexts assessed
technologien ad » technologien am, technologien und, technologien als
ad information » d information, nd information, od information
3 developing » 3 development
vf face » von face
costs 3 » costs _, costs 4, costs a
3.2 vf » 3.2 vi, 3.2 vr

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

• Adding a wildcard symbol may retrieve word variants: technologien ad information 3.2 vf face communication costs 3 developing concepts assessed.*.