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
ad information » d information, nd information, od information
2.1 personal » 3.1 personal, 2.3 personal, 2.4 personal
a developing » a development
developing 2 » developing _, developing a, developing e
costs 2.1 » costs 2.3, costs 4.1, costs 2.2
2 access » 3 access
costs a » costs _, costs 4

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 2.1 personal communication costs a developing 2 access.*.