Perhaps you should try some spelling variations:
face communication » voice communication, de communication, time communication
information costs » information contents, information centers, information content
du developpement » de developpement, le developpement, et developpement
developpement de » developpement des, developpement durable
technologies 2 » technologies _, technologies 4
costs 3.2 » costs 4.2, cost 3.2, costs 3.5
3.2 face » 2.2 face, 6.2 face, 12.2 face

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

• Adding a wildcard symbol may retrieve word variants: technologies 2 information costs 3.2 face communication _ du developpement de l'afrique.*.