Perhaps you should try some spelling variations:
3.2 communication » 3 communication, 2.3 communication, de communication
des developpement » des developpements, de developpement, le developpement
developpement en » developpement et, developpement des, developpement de
selection wage » selection stage, selection based, selection chase
technology 2 » technology _, technology 1, technology 3
2 selection » 3.2 selection, 2.1 selection, de selection
wage rate » wage rates
costs des » costs fees
rate 3.2 » rates 3.2, rate 4.2, rate 5.2

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

• Adding a wildcard symbol may retrieve word variants: technology 2 selection wage rate 3.2 communication costs des developpement en afrique.*.