Perhaps you should try some spelling variations:
technology case » technology based, technology can, technology change
4 communication » 3 communication, 5.4 communication, de communication
4 developpement » de developpement, le developpement, et developpement
case selection » sample selection
selection wage » selection stage, selection based, selection chase
des afrique » en afrique, de l'afrique
wage rate » wage rates
costs 4 » costs _, costs a, costs 4.2
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 case selection wage rate 4 communication costs 4 developpement des afrique.*.