Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
transfer simulation » transfer simulations, transport simulation, transport simulations
developpement en » developpement et, developpement des, developpement de
4 developpement » de developpement, le developpement, et developpement
simulation des » simulation _, simulation 4, simulation 3
des use » des us, des usa, des uber
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 transfer simulation des use data communications costs 4 developpement en afrique.*.