Perhaps you should try some spelling variations:
optical communication » optical communications, optic communication, political communication
communication model » communication media
ou developpement » du developpement, au developpement, de developpement
technology cost » technology case, technology can, technology choice
cost integrated » cae integrated, debt integrated, more integrated
integrated land » integrated plan, integrated flood, integrated care
developpement l » developpement il, developpement la, developpement de
l afrique » en afrique
model ou » model old, model 1, model 2

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

• Adding a wildcard symbol may retrieve word variants: technology cost integrated land _ optical communication model ou developpement l afrique.*.