Perhaps you should try some spelling variations:
6b informationsbereich » 6 informationsbereich, 6 informationsbrev, b informationsanreize
informationsbereich iv » 6 informationsbereich, informationswert iv
oral communication » personal communication
technologien fur » technologien des, technologien und, technologies 2
4 developing » 3 developing
developing 2 » developing _, developing a, developing e
iv oral » iv moral, i oral, ii oral
costs 4 » costs _, costs a, costs 4.2
2 areas » 1 areas, 2 areal, 4 areas

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

• Adding a wildcard symbol may retrieve word variants: technologien fur 6b informationsbereich iv oral communication costs 4 developing 2 areas.*.