Perhaps you should try some spelling variations:
communications systems » communication systems, communications system, communication system
du developpement » de developpement, le developpement, et developpement
developpement de » developpement des, developpement durable
technologies 4 » technologies _
4 transition » 2 transition, de transition, en transition
systems du » systems due, systems do, systems dr
de africa » does africa, de america, use africa
der data » under data, order data, der daten

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

• Performing a fuzzy search may retrieve terms with similar spellings: technologies 4 transition _ der data communications systems du developpement de africa.~.
• Adding a wildcard symbol may retrieve word variants: technologies 4 transition _ der data communications systems du developpement de africa.*.