Perhaps you should try some spelling variations:
optical communication » optical communications, optic communication, political communication
deux developpements » des developpements, de developpement, du developpement
developpements de » developpement de, developpement des, developpement du
variation over » variation der, variation notes, variation des
typologie die » typologie des, typologie der, theologie die
die variation » de variation, does variation, der variation
de afrique » de l'afrique, en afrique, l afrique
3 optical » _ optical, 3 optimal, 3.3 optical
over 3 » cover 3, over 34, over 35

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

• Adding a wildcard symbol may retrieve word variants: typologie die variation over 3 optical communication a deux developpements de afrique.*.