Perhaps you should try some spelling variations:
personal communication » interpersonal communication
information costs » information contents, information centers, information content
technologien ad » technologien am, technologien und, technologien als
4.4 development » 2.4 development, 9.4 development, 1.4 development
ad information » d information, nd information, od information
development 10 » developments 10, development 100, development 1
de personal » der personal, des personal, de persona
costs 4.4 » costs 4.2
10 access » 1.1 access, 2 access, 3 access
costs de » costs _, costs a, costs 5

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 de personal communication costs 4.4 development 10 access.*.