Perhaps you should try some spelling variations:
verbal communication » nonverbal communication, virtual communication, oral communication
information centres » information centre, information centrism, information centers
technologien math » technologien mit, technologien als, technologien am
math information » catch information, much information, health information
4 developing » 3 developing
developing a » developing _
centres der » centres de, centre de, centre des
der verbal » des verbal, der verbalen, der verband
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 math information centres der verbal communication costs 4 developing a africa.*.