Perhaps you should try some spelling variations:
device communication » services communication, voice communication, mobile communication
information 6.1 » information 1, information 1.2, information 1.3
technologies 2 » technologies _, technologies 4
4.3 developing » 3.3 developing, 1.3 developing, 7.3 developing
developing a » developing _
und device » end device, und service, end devices
costs 4.3 » costs 4.2, costs 4.4, costs 2.3
6.1 und » 5.1 und, 6.1 bound, 6.1 unit

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

• Adding a wildcard symbol may retrieve word variants: technologies 2 information 6.1 und device communication costs 4.3 developing a real.*.