Perhaps you should try some spelling variations:
optical communicating » optical communications, optical communication, optic communication
communicating model » communication model, communicating under, communication modes
technology trade » technology trends, technology transfer, technology transfers
integration work » integrating world, integration framework, integration 3
developpement en » developpement et, developpement des, developpement de
d developpement » de developpement, du developpement, le developpement
model d » model du, modell d, model 1

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

• Adding a wildcard symbol may retrieve word variants: technology trade integration work _ optical communicating model d developpement en afrique.*.