Perhaps you should try some spelling variations:
visual communication » oral communication, personal communication
technologien des » technologien fur, technologien und, technologies 2
information used » information use, information users, information based
developing areas » developing asia, developing east, developing a
des information » des informations, does information, dis information
4 developing » 3 developing
areas areas » areas arenas, seas areas, areas access
used based » user based, use based, users based
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technologien des information used based visual communication costs 4 developing areas areas.*.