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 east » development east, developing a, developing asia
information 1 » information 2, information 3, information 3.2
east stresses » east successes, day stresses, heat stressed
4 developing » 3 developing
2d voice » 2.1 voice, 2.4 voice, und voice
costs 4 » costs _, costs a, costs 4.2
1 2d » 1 2, _ 2d, 2 2d

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 2d voice communication costs 4 developing east stresses.*.