Perhaps you should try some spelling variations:
optical communication » optical communications, optic communication, political communication
communication model » communication media
deep developpement » de developpement, deux developpements, le developpement
4ir integration » zur integration, der integration, 4 integration
technology 4ir » technology 4, technology 4.1, technology 4.2
des afrique » en afrique, de l'afrique
32 optical » 3.2 optical, 3 optical, 12 optical

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

• Adding a wildcard symbol may retrieve word variants: technology 4ir integration _ 32 optical communication model deep developpement des afrique.*.