Perhaps you should try some spelling variations:
optical communication » optical communications, optic communication, political communication
communication skills » communication services, communication systems
do developpement » de developpement, du developpement, le developpement
information 1.2 » information 1.5.2, information 2
14 optical » 12 optical, 4 optical, _ optical
des africa » does africa, yes africa, de africa
skills do » skills how, skills _, skills a
1.2 14 » 1.2 1.4, 4.2 14

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

• Adding a wildcard symbol may retrieve word variants: technologies _ information 1.2 14 optical communication skills do developpement des africa.*.