Perhaps you should try some spelling variations:
optical communications » optic communication, political communication, digital communications
communications model » communications models, communication model, communicating model
integration work » integrating world, integration framework, integration 3
du developpement » de developpement, le developpement, et developpement
die integration » trade integration
technology die » technologie die, technology does, technology 4ir
des afrique » en afrique, de l'afrique
1 optical » 12 optical, 14 optical, _ optical
model du » model due, model d, model dal
work 1 » work 3, work 6, work 7

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

• Adding a wildcard symbol may retrieve word variants: technology die integration work 1 optical communications model du developpement des afrique.*.