Perhaps you should try some spelling variations:
optical communication » optical communications, optic communication, political communication
communication skills » communication services, communication systems
au developpement » du developpement, de developpement, le developpement
information 1 » information 2, information 3, information 3.2
des africa » does africa, yes africa, de africa
1 optical » 12 optical, 14 optical, _ optical
skills au » skills a, skills gap, skills can

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

• Adding a wildcard symbol may retrieve word variants: technologies _ information 1 1 optical communication skills au developpement des africa.*.