Perhaps you should try some spelling variations:
vote communication » voice communication, ante communication, remote communication
technologien des » technologien fur, technologien und, technologies 2
information case » information based, information can, information costs
des information » des informations, does information, dis information
20 development » 2 development, 2015 development, 2007 development
development 4 » development 1
costs 20 » costs 60, costs 2.3, costs 2.1
case dm » case d, case d1, case d2
4 areas » 1 areas, 2 areas, 4 areal

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

• Adding a wildcard symbol may retrieve word variants: technologien des information case dm vote communication costs 20 development 4 areas.*.