Perhaps you should try some spelling variations:
mobile communications » mobile communication
communications tres » communication tres, communications tec, communications series
developpement en » developpement et, developpement des, developpement de
a developpement » au developpement, de developpement, le developpement
informal 1.4 » informal 8.4, informal 4.2, informal q4
die mobile » does mobile, das mobile, day mobile
1.4 die » 3.4 die, 2.4 die
tres a » trees a, trest a, autres a

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

• Adding a wildcard symbol may retrieve word variants: technology from informal 1.4 die mobile communications tres a developpement en afrique.*.