Perhaps you should try some spelling variations:
transformation its » transformation als, transformation im, transformation aus
oral communication » personal communication
de transformation » die transformation, e transformation, 1 transformation
technologie de » technologies de, technologie der, technologie die
challenge oral » challenges moral, challenge rural, challenge global
its challenge » its challenges, data challenge, jobs challenge
3 developing » 3 development
developing 2 » developing _, developing a, developing e
costs 3 » costs _, costs 4, costs a
2 areal » 2 real, _ areal, 2 areas

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

• Adding a wildcard symbol may retrieve word variants: technologie de transformation its challenge oral communication costs 3 developing 2 areal.*.