Perhaps you should try some spelling variations:
voice communication » voice communications, mobile communication, device communication
developing farmers » developing areas, developing forms, developing managers
technologien dis » technologien des, technologien als, technologien im
information case » information based, information can, information costs
dis information » mis information, aids information, des informations
a developing » a development
3 voice » 3 voices, _ voice, a voice
costs a » costs _, costs 4
case 3 » case 1, case 2

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

• Adding a wildcard symbol may retrieve word variants: technologien dis information case 3 voice communication costs a developing farmers access.*.