Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
3.1 communications » 3.1 communication, 4.1 communication, 1.1 communication
developpement en » developpement et, developpement des, developpement de
technology best » technology based
4 developpement » de developpement, le developpement, et developpement
best inflation » bei inflation, modest inflation, about inflation
case 3.1 » case 4.1, case 3.2, case 1
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 best inflation _ case 3.1 communications costs 4 developpement en afrique.*.