Perhaps you should try some spelling variations:
radio communications » radio communication, data communications
does developpement » de developpement, des developpements, does development
developpement l » developpement il, developpement la, developpement de
variation over » variation der, variation notes, variation des
typologie der » typologie des, ideologie der
der variation » de variation, does variation, die variation
das radio » deals radio, desi radio, a radio
l afrique » en afrique
over das » cover das, oder das, over data

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

• Adding a wildcard symbol may retrieve word variants: typologie der variation over das radio communications _ does developpement l afrique.*.