Perhaps you should try some spelling variations:
optical communication » optical communications, optic communication, political communication
technologies co » technologies _, technologies 4, technologies 2
key development » city development, mena development, energy development
co information » do information, 2 information, 1 information
de optical » _ optical, 3 optical, 12 optical
costs key » costs amy
a afrique » l afrique, en afrique
about de » about due, about dead, about debt

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

• Adding a wildcard symbol may retrieve word variants: technologies co information about de optical communication costs key development a afrique.*.