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 2 » variations _, variation 2, variations 1
der optical » der optimale, der optimalen, depth optical
l afrique » en afrique
2 der » _ der
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 2 der optical communication a l developpement l afrique.*.