Perhaps you should try some spelling variations:
optical communication » optical communications, optic communication, political communication
communication model » communication media
law developpement » le developpement, au developpement, leur developpement
developpement en » developpement et, developpement des, developpement de
die integration » trade integration
technology die » technologie die, technology does, technology 4ir
3 optical » _ optical, 3 optimal, 3.3 optical

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

• Adding a wildcard symbol may retrieve word variants: technology die integration 3 3 optical communication model law developpement en afrique.*.