Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
voice communications » mobile communications, guinea communications, online communications
technologien does » technologien des, technologien als, technologie de
information 1.5.2 » information 1.2, information 2
does information » des informations, dis information, users information
4 developing » 3 developing
developing a » developing _
a access » 2 access, 3 access, 4 access
1.5.2 5 » 1.5.2 _, 1.5.2 a
5 voice » 5 voices, _ voice, a voice
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 does information 1.5.2 5 voice communications costs 4 developing a access.*.