Perhaps you should try some spelling variations:
downward communication » towards communication, aware communication, hazard communication
information age » information storage, information access, information about
communication 4 » communication _, communication a, communication 3
technologies 4 » technologies _
4.2.1 downward » 2.5 downward
4 information » 2 information, 1 information
developing e » developing _, developing a, developing east
age 4.2.1 » age 4.2.6, age 5.2.1, age 4.2.3.1
e afrique » en afrique, l afrique, de l'afrique

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

• Adding a wildcard symbol may retrieve word variants: technologies 4 information age 4.2.1 downward communication 4 _ developing e afrique.*.