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 dis » technologien des, technologien als, technologien im
dis information » mis information, aids information, des informations
2.3 developing » 3.3 developing, 2.2 developing, 1.3 developing
information 2 » information 3
costs 2.3 » costs 4.2, costs 4.4
ri face » ai face, i face, die face
2 ri » 2 mri, 2 rri, 2 re

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

• Adding a wildcard symbol may retrieve word variants: technologien dis information 2 ri face communication costs 2.3 developing concepts assessed.*.