Perhaps you should try some spelling variations:
leur developpement » le developpement, deux developpements, de developpement
data communication » data communications
technologies 4 » technologies _
4 information » 2 information, 1 information
des afrique » en afrique, de l'afrique
does data » does cat
3.2 does » 13.2 does, 3.1 does, 3.4.2 does

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

• Adding a wildcard symbol may retrieve word variants: technologies 4 information 3.2 does data communication media leur developpement des afrique.*.