Perhaps you should try some spelling variations:
optical communication » optical communications, optic communication, political communication
communication skills » communication services, communication systems
als developpement » le developpement, au developpement, des developpements
skills als » skills gaps, skills a, skills ana
des africa » does africa, yes africa, de africa
1 optical » 12 optical, 14 optical, _ optical
3.2 1 » 3.2 _, 3.2 a, 3.0 1

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

• Adding a wildcard symbol may retrieve word variants: technologies _ information 3.2 1 optical communication skills als developpement des africa.*.