Perhaps you should try some spelling variations:
voice communication » voice communications, mobile communication, device communication
technologien als » technologien des, technologien fur, technologien und
als information » als informations, aids information, laws information
developing asia » development asia, developing a
information 1 » information 2, information 3, information 3.2
4 developing » 3 developing
2 voice » _ voice, a voice, 5 voice
costs 4 » costs _, costs a, costs 4.2
stresses. » stress.

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

• Adding a wildcard symbol may retrieve word variants: technologien als information 1 2 voice communication costs 4 developing asia stresses.*.