Perhaps you should try some spelling variations:
verbal communication » nonverbal communication, virtual communication, oral communication
technologien aids » technologien als, technologien ad, technologien des
aids information » chandos information, series information
developing data » developing a, developing asia, developing east
4.1 developing » 3.1 developing, 4 developing, 3.3 developing
information 3 » information 2
data africa » ratha african, intra africa, baga african
des verbal » des verbalen, des verbs, models verbal
costs 4.1 » costs 4.2, costs 4.4, costs 4.3
3 des » 3 der, 3 das, a des

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

• Adding a wildcard symbol may retrieve word variants: technologien aids information 3 des verbal communication costs 4.1 developing data africa.*.