Perhaps you should try some spelling variations:
information centre » information centers, information contents
oral communication » personal communication
6.4 developing » 5.4 developing, 3.3 developing, 2.2 developing
developing a » developing _
centre de » centre _, centrale des
costs 6.4 » costs 4.4, costs 4.2, costs 2.3
a africa » 1 africa, can africa, em africa
de oral » de otras, new oral

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

• Adding a wildcard symbol may retrieve word variants: technologien _ information centre de oral communication costs 6.4 developing a africa.*.