Perhaps you should try some spelling variations:
optical communication » optical communications, optic communication, political communication
l developpement » le developpement, de developpement, et developpement
developpement l » developpement il, developpement la, developpement de
et variations » its variations, 1er variations, ier variations
typologie et » typologie des, typologie der, typologie von
variations 6 » variations _, variation 6, variations 1
de optical » _ optical, 3 optical, 12 optical
l afrique » en afrique
6 de » 6 die, 6 der, _ de
a l » a la

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

• Adding a wildcard symbol may retrieve word variants: typologie et variations 6 de optical communication a l developpement l afrique.*.