Perhaps you should try some spelling variations:
optical communications » optic communication, political communication, digital communications
communications model » communications models, communication model, communicating model
technologien am » technologien im, technologien als, technologie im
d developpement » de developpement, du developpement, le developpement
am integration » tam integration, crm integration, shm integration
des afrique » en afrique, de l'afrique
14 optical » 12 optical, 4 optical, _ optical
model d » model du, modell d, model 1
3 14 » 13 14, 3 4, _ 14

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

• Adding a wildcard symbol may retrieve word variants: technologien am integration 3 14 optical communications model d developpement des afrique.*.