Perhaps you should try some spelling variations:
optical communication » optical communications, optic communication, political communication
communication model » communication media
integration work » integrating world, integration framework, integration 3
du developpement » de developpement, le developpement, et developpement
developpement en » developpement et, developpement des, developpement de
dis integration » disintegration _
technology dis » technology does, technology 4ir, technology dlt
model du » model due, model d, model dal

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

• Adding a wildcard symbol may retrieve word variants: technology dis integration work _ optical communication model du developpement en afrique.*.