Perhaps you should try some spelling variations:
1963 communication » 13 communication, 1.3 communication, 19 communication
technology change » technological change, technological changes
change simulation » change simulations, channel simulation, change population
simulation rates » simulation states, simulation cases, simulations notes
developpement en » developpement et, developpement des, developpement de
4 developpement » de developpement, le developpement, et developpement
rates dan » rates data, rates hans, rates a
dan 1963 » dan 1965, hans 1963, a 1963
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 rates dan 1963 communication costs 4 developpement en afrique.*.