Perhaps you should try some spelling variations:
actors communication » actions communication, active communication, networks communication
technologies trade » technology trade, technologies case, technologies table
trade information » price information, private information, trade integration
communication 5.5 » communication 3.3, communication 2.4, communication 3.2
information age » information storage, information access, information about
development li » development lid, development lie, development lin
li afrique » l afrique, en afrique
2 actors » _ actors, 3 actors, 5 actors
age 2 » age _, age a, age 6
5.5 a » 5.5 _, 2.5 a, 4.5 a

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

• Adding a wildcard symbol may retrieve word variants: technologies trade information age 2 actors communication 5.5 a development li afrique.*.