Perhaps you should try some spelling variations:
optical communication » optical communications, optic communication, political communication
communication model » communication media
du developpement » de developpement, le developpement, et developpement
developpement l » developpement il, developpement la, developpement de
1 integration » 10 integration, 11 integration, 12 integration
technology 1 » technology _
2 optical » 12 optical, 20 optical, _ optical
l afrique » en afrique
model du » model due, model d, model dal

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

• Adding a wildcard symbol may retrieve word variants: technology 1 integration 3 2 optical communication model du developpement l afrique.*.