Perhaps you should try some spelling variations:
device communication » services communication, voice communication, mobile communication
der developpement » de developpement, des developpements, leur developpement
communication 3 » communication _, communication a
des l'afrique » de l'afrique, de l'amerique
typologie de » typologie des, typologie der, typologien der
de variation » der variation, die variation, does variation
des device » vs device, less devices, types device
3 der » _ der, 2 der

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

• Adding a wildcard symbol may retrieve word variants: typologie de variation _ des device communication 3 der developpement des l'afrique.*.