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 la » developpement de, developpement et, developpement du
4ir integration » zur integration, der integration, 4 integration
technology 4ir » technology 4, technology 4.1, technology 4.2
la afrique » l afrique, la fabrique, en afrique
1 optical » 12 optical, 14 optical, _ optical
model due » model du, model deep, model d

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

• Adding a wildcard symbol may retrieve word variants: technology 4ir integration 3 1 optical communication model due developpement la afrique.*.