Perhaps you should try some spelling variations:
close communication » elite communication, prone communication, vote communication
formation contents » information contents, formation contenu, information content
technologies 4 » technologies _
4.1 developing » 3.1 developing, 4 developing, 3.3 developing
developing 1 » developing _, developing a, developing e
4 formation » 1 formation, a formation, 4 formulation
contents so » contents co, contents how, contents 1
costs 4.1 » costs 4.2, costs 4.4, costs 4.3
so close » how close, _ close, a close

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

• Adding a wildcard symbol may retrieve word variants: technologies 4 formation contents so close communication costs 4.1 developing 1 africa.*.