Perhaps you should try some spelling variations:
leur developpement » le developpement, deux developpements, de developpement
communication cost » communication costs, communication costa, communications costs
information case » information based, information can, information costs
technologies a » technologies _, technologies 4, technologies 2
a information » 2 information, 1 information
des afrique » en afrique, de l'afrique
a mobile » _ mobile
case a » case 1, case 2, case 3

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

• Adding a wildcard symbol may retrieve word variants: technologies a information case a mobile communication cost leur developpement des afrique.*.