Perhaps you should try some spelling variations:
oral communication » personal communication
technologien des » technologien fur, technologien und, technologies 2
des information » des informations, does information, dis information
contents maps » contents map, contents main, contents major
developing de » developing e, developing ce, developing deep
4 developing » 3 developing
de africa » does africa, de america, use africa
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 des information contents maps oral communication costs 4 developing de africa.*.