Perhaps you should try some spelling variations:
information century » information centers, information centre, information center
technologien fairs » technologien fur, technologien als, technologies fail
oral communication » personal communication
fairs information » fair information, aids information, dis information
developing em » developing e, developing eq, developing amp
4 developing » 3 developing
em africa » 1 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 fairs information century new oral communication costs 4 developing em africa.*.