Perhaps you should try some spelling variations:
voice communication » voice communications, mobile communication, device communication
information costs » information contents, information centers, information content
technologien dis » technologien des, technologien als, technologien im
dis information » mis information, aids information, des informations
4 developing » 3 developing
developing a » developing _
a access » 2 access, 3 access, 4 access
costs 4 » costs a, costs 4.2, costs 4.4

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

• Adding a wildcard symbol may retrieve word variants: technologien dis information costs _ voice communication costs 4 developing a access.*.