Perhaps you should try some spelling variations:
information system » information systems
oral communication » personal communication
technologien aids » technologien als, technologien ad, technologien des
aids information » chandos information, series information
4 developing » 3 developing
developing a » developing _
system die » system der, system des
die oral » die moral, die orte
a africa » 1 africa, can africa, em africa
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 aids information system die oral communication costs 4 developing a africa.*.