Perhaps you should try some spelling variations:
communication system » communication systems, telecommunication system, communication series
data communication » data communications
transformation e » transformation et, transformation _, transformation a
et developpement » de developpement, le developpement, test development
developpement de » developpement des, developpement durable
system et » systeme et, system e, system eu
de africa » does africa, de america, use africa
de data » e data, wide data, de datos
e de » et de, e die, e der

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

• Adding a wildcard symbol may retrieve word variants: technologien _ transformation e de data communication system et developpement de africa.*.