Perhaps you should try some spelling variations:
optical communication » optical communications, optic communication, political communication
communication model » communication media
le developpement » de developpement, sme development
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
a optical » _ optical, 3 optical, 4 optical
l afrique » en afrique
model le » model led, model law, model 1
land a » land _, poland a

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 a optical communication model le developpement l afrique.*.