Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
technologies volume » technology volume, technologies policies
3.1 communications » 3.1 communication, 4.1 communication, 1.1 communication
volume estimation » value estimation, volume ventilation, pose estimation
developpement l » developpement il, developpement la, developpement de
estimation des » estimation de, estimation dust, estimacion de
l afrique » en afrique
des case » des coase, des cas, des care
case 3.1 » case 4.1, case 3.2, case 1

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

• Adding a wildcard symbol may retrieve word variants: technologies volume estimation des case 3.1 communications costs _ developpement l afrique.*.