Perhaps you should try some spelling variations:
6.2 communication » 3.2 communication, 2.3 communication, 2.7 communication
integration wage » integration wege, integration wie, integration work
developpement de » developpement des, developpement durable
2.2 integration » 3.2 integration, 5.2 integration, 3.3 integration
4 developpement » de developpement, le developpement, et developpement
technology 2.2 » technology _, technology 1, technology 3
wage rate » wage rates
rate 6.2 » rates 6.2, rate 4.2, rate 5.2
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 2.2 integration wage rate 6.2 communication costs 4 developpement de l'afrique.*.