Perhaps you should try some spelling variations:
information centers » information contents, information officers
oral communication » personal communication
technologien ad » technologien am, technologien und, technologien als
development can » development case, development co, development canada
ad information » d information, nd information, od information
4 development » 2 development, 4 developing
centers new » century new, centers money, centuries new
can africa » urban africa
new oral » new moral, knew moral, new rural
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 ad information centers new oral communication costs 4 development can africa.*.