Perhaps you should try some spelling variations:
face communication » voice communication, de communication, time communication
information costs » information contents, information centers, information content
communication 7.1 » communication 4.1, communication 1, communication 3.3
technologies 2 » technologies _, technologies 4
development li » development lid, development lie, development lin
li afrique » l afrique, en afrique
costs 2.1 » costs 2.3, costs 4.1, costs 2.2
2.1 face » 2.2 face, 2.3 face, 4.1 face
7.1 a » 2.1 a, 7.1 _, 3.1 a

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 2.1 face communication 7.1 a development li afrique.*.