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 du » developpement de, developpement des, developpement et
technologies 2 » technologies _, technologies 4
du afrique » en afrique, l afrique, de l'afrique
costs 2.2 » costs 4.2, costs 2.3, cost 2.2
2.2 face » 12.2 face, 2.3 face, 3.2 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 2.2 face communication _ du developpement du afrique.*.