Perhaps you should try some spelling variations:
communications system » communication system, communication systems, commusnication systems
des developpement » des developpements, de developpement, le developpement
technologies de » technologies _, technologies 4, technologies 2
de transition » phase transition
under data » und data, user data
system des » system der, system design
des africa » does africa, yes africa, de africa

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

• Adding a wildcard symbol may retrieve word variants: technologies de transition _ under data communications system des developpement des africa.*.