Perhaps you should try some spelling variations:
verbal communication » nonverbal communication, virtual communication, oral communication
information centers » information contents, information officers
technologie und » technologies 2.1
und information » fund information, road information, award information
4.1 developing » 3.1 developing, 4 developing, 3.3 developing
developing 1 » developing _, developing a, developing e
centers 1 » centers 10, centers 21, centers _
costs 4.1 » costs 4.2, costs 4.4, costs 4.3
1 verbal » _ verbal, 3 verbal, a verbal

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

• Adding a wildcard symbol may retrieve word variants: technologie und information centers 1 verbal communication costs 4.1 developing 1 africa.*.