Perhaps you should try some spelling variations:
oral communication » personal communication
information costs » information contents, information centers, information content
technologien nd » technologien und, technologien ad, technologie und
nd information » und information, d information, od information
4 developing » 3 developing
developing a » developing _
costs 2.2 » costs 4.2, costs 2.3, cost 2.2
2.2 oral » 2.1 oral, 2.2 rural, 2.2 viral
a access » 2 access, 3 access, 4 access
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technologien nd information costs 2.2 oral communication costs 4 developing a access.*.