Perhaps you should try some spelling variations:
6.2 communication » 3.2 communication, 2.3 communication, 2.7 communication
technologies can » technologies a, technologies co, technologies _
developpement de » developpement des, developpement durable
can information » von information, von informationen
4 developpement » de developpement, le developpement, et developpement
model date » model data, model kate, model update
de afrique » de l'afrique, en afrique, l afrique
date 6.2 » daten 6.2, data 6.2, date 4.2
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technologies can information model date 6.2 communication costs 4 developpement de afrique.*.