Perhaps you should try some spelling variations:
vertical communication » verbal communication, virtual communication, optical communication
du developpement » de developpement, le developpement, et developpement
typologies des » typologie des, typologie der, typologien der
des variation » does variation, de variation, der variation
variation bei » variation des, variation der, variation _
does vertical » ones vertical, forest vertical, boost vertical
des afrique » en afrique, de l'afrique
bei does » being does, behn does, bei der
a du » a d, a de, a u

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

• Adding a wildcard symbol may retrieve word variants: typologies des variation bei does vertical communication a du developpement des afrique.*.