Perhaps you should try some spelling variations:
developpements des » developpement des, developpements de, developpement de
des developpements » deux developpements, de developpement, et developpements
selection based » detection based, selection bias
4 communication » 3 communication, 5.4 communication, de communication
technology 3 » technology _, technology 1, technology 4
3 selection » 2 selection, 1 selection, 4 selection
des afrique » en afrique, de l'afrique
based rate » based rebate, based water, based route
costs des » costs fees
rate 4 » rate _

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

• Adding a wildcard symbol may retrieve word variants: technology 3 selection based rate 4 communication costs des developpements des afrique.*.