Perhaps you should try some spelling variations:
voice communication » voice communications, mobile communication, device communication
informations 11.3 » information 11.3, information 1.3, information 11.2
technologien des » technologien fur, technologien und, technologies 2
des informations » aids information
4.1 developing » 3.1 developing, 4 developing, 3.3 developing
developing a » developing _
costs 4.1 » costs 4.2, costs 4.4, costs 4.3
a access » 2 access, 3 access, 4 access

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

• Adding a wildcard symbol may retrieve word variants: technologien des informations 11.3 _ voice communication costs 4.1 developing a access.*.