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
de developpement » sme development
developpement en » developpement et, developpement des, developpement de
4ir integration » zur integration, der integration, 4 integration
technology 4ir » technology 4, technology 4.1, technology 4.2
model de » model due, model d, model du

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

• Adding a wildcard symbol may retrieve word variants: technology 4ir integration work _ optical communication model de developpement en afrique.*.