Perhaps you should try some spelling variations:
optical communication » optical communications, optic communication, political communication
communication model » communication media
due developpement » de developpement, du developpement, le developpement
developpement l » developpement il, developpement la, developpement de
technology zur » technology 4ir, technologien zur, technology _
1 optical » 12 optical, 14 optical, _ optical
model due » model du, model deep, model d
l afrique » en afrique

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

• Adding a wildcard symbol may retrieve word variants: technology zur integration 3 1 optical communication model due developpement l afrique.*.