Perhaps you should try some spelling variations:
oral communication » personal communication
information costs » information contents, information centers, information content
technologien ad » technologien am, technologien und, technologien als
6.4 development » 2.4 development, 9.4 development, 1.4 development
development 3.1 » development 1
ad information » d information, nd information, od information
3.1 access » 1.1 access, 3.2 access, 3.6 access
costs 6.4 » costs 4.4, costs 4.2, costs 2.3
costs 4 » costs _, costs a, costs 4.2
4 oral » _ oral, 2 oral

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

• Adding a wildcard symbol may retrieve word variants: technologien ad information costs 4 oral communication costs 6.4 development 3.1 access.*.