Perhaps you should try some spelling variations:
optical communication » optical communications, optic communication, political communication
communication modell » communication model, communications models, communication modes
integration work » integrating world, integration framework, integration 3
developpement en » developpement et, developpement des, developpement de
d developpement » de developpement, du developpement, le developpement
4 integration » 3 integration, 2 integration, 4.1 integration
technology 4 » technology _, technology 1, technology 3
3 optical » _ optical, 3 optimal, 3.3 optical
modell d » modell 1, modell 2, modell 4

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

• Adding a wildcard symbol may retrieve word variants: technology 4 integration work 3 optical communication modell d developpement en afrique.*.