Perhaps you should try some spelling variations:
radio communications » radio communication, data communications
does developpement » de developpement, des developpements, does development
developpement en » developpement et, developpement des, developpement de
typologie does » typologie des, typologie der, typologie cices
does variation » de variation, der variation, die variation
variation over » variation der, variation notes, variation des
das radio » deals radio, desi radio, a radio
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 does variation over das radio communications _ does developpement en afrique.*.