Perhaps you should try some spelling variations:
optical communication » optical communications, optic communication, political communication
technologies used » technologies based, technology used, technologies _
information needs » information networks
used information » user information, use information, based information
de developpement » sme development
developpement de » developpement des, developpement durable
men optical » msi optical, syn optical, leaf optical
de afrique » de l'afrique, en afrique, l afrique

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

• Performing a fuzzy search may retrieve terms with similar spellings: technologies used information needs men optical communication _ de developpement de afrique.~.
• Adding a wildcard symbol may retrieve word variants: technologies used information needs men optical communication _ de developpement de afrique.*.