Perhaps you should try some spelling variations:
face communication » voice communication, de communication, time communication
communication 3.3 » communication _, communication a, communication 1
technologies 1 » technologies _, technologies 4, technologies 2
developing l2 » developing _, developing a, developing e
contents 25 » contents 2.5, contents 2.1, contents 2.3
l2 afrique » l afrique, en afrique
25 face » 15 face, 2 face, 5 face

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

• Adding a wildcard symbol may retrieve word variants: technologies 1 information contents 25 face communication 3.3 _ developing l2 afrique.*.