Perhaps you should try some spelling variations:
optical communication » optical communications, optic communication, political communication
communication model » communication media
due developpement » de developpement, du developpement, le developpement
integration work » integrating world, integration framework, integration 3
developpement en » developpement et, developpement des, developpement de
technologie de » technologies de, technologie der, technologie die
de integration » die integration, re integration, une integration
model due » model du, model deep, model d

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

• Adding a wildcard symbol may retrieve word variants: technologie de integration work _ optical communication model due developpement en afrique.*.