Perhaps you should try some spelling variations:
information centers » information contents, information officers
oral communication » personal communication
technologien des » technologien fur, technologien und, technologies 2
des information » des informations, does information, dis information
developing 11 » developing _, developing a, developing e
a developing » a development
centers new » century new, centers money, centuries new
11 african » 1.1 african, 1 african, 10 african
new oral » new moral, knew moral, new rural
costs a » costs _, costs 4

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

• Adding a wildcard symbol may retrieve word variants: technologien des information centers new oral communication costs a developing 11 african.*.