Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
2.2 communications » 2.2 communication, 4.2 communications, 3.2 communication
technology change » technological change, technological changes
change simulation » change simulations, channel simulation, change population
4 developpement » de developpement, le developpement, et developpement
developpement l » developpement il, developpement la, developpement de
based cases » based causes, based case, based care
cases 2.2 » cases 4.2, cases 3.3, cases 3.1
l afrique » en afrique
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technology change simulation based cases 2.2 communications costs 4 developpement l afrique.*.