Perhaps you should try some spelling variations:
optes communication » optic communication, nets communication, computer communication
does developpement » de developpement, des developpements, does development
developpement l » developpement il, developpement la, developpement de
variation des » variation _, variation 6, variation series
der optes » des optes, der opfer, der oper
l afrique » en afrique
des der » des dr, des ddr, des dem
a does » 2 does, 4 does, 1 does

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

• Adding a wildcard symbol may retrieve word variants: typology _ variation des der optes communication a does developpement l afrique.*.