Perhaps you should try some spelling variations:
technology change » technological change, technological changes
change simulation » change simulations, channel simulation, change population
19 communication » 1 communication, 10 communication, 9 communication
au developpement » du developpement, de developpement, le developpement
simulation rate » simulation state, simulation data, simulation states
des afrique » en afrique, de l'afrique
rate can » rate cap, rate caps, rate band
costs au » costs a, costs amy, costs _
can 19 » can 11, can 1973

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

• Adding a wildcard symbol may retrieve word variants: technology change simulation rate can 19 communication costs au developpement des afrique.*.