Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
u.s communications » 3.1 communications, les communications, nps communications
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 case » based care, base case, based phase
l afrique » en afrique
case u.s » case 4.1, case 4.2, case 2.3
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 case u.s communications costs 4 developpement l afrique.*.