Perhaps you should try some spelling variations:
radio communications » radio communication, data communications
u.s developpement » u.s development, un developpement, des developpements
communications a » communications _, communications law, communications media
typologies des » typologie des, typologie der, typologien der
des variation » does variation, de variation, der variation
variation 6 » variation _, variations _, variation des
des afrique » en afrique, de l'afrique
does radio » das radio
6 does » 16 does, 2 does, 4 does
a u.s » _ u.s

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

• Adding a wildcard symbol may retrieve word variants: typologies des variation 6 does radio communications a u.s developpement des afrique.*.