Perhaps you should try some spelling variations:
optical communication » optical communications, optic communication, political communication
technologies 2 » technologies _, technologies 4
other optical » other political, other official, other critical
development l » development li, development 1, development law
about other » about them, out other
l afrique » en afrique
costs a » costs _, costs 4

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

• Adding a wildcard symbol may retrieve word variants: technologies 2 information about other optical communication costs a development l afrique.*.