Perhaps you should try some spelling variations:
base communication » based communication, face communication, aware communication
information costs » information contents, information centers, information content
communication 1 » communication _, communication a, communication 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 base » 2.1 bases, 2.1 case, 3.1 base

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 base communication 1 a development li afrique.*.