Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
technologies volume » technology volume, technologies policies
3.2 communications » 3.2 communication, 3.1 communications, 4.2 communications
volume estimation » value estimation, volume ventilation, pose estimation
estimation ages » estimation des, estimation tables, estimation based
developpement l » developpement il, developpement la, developpement de
ages case » wages case, age case, cases case
l afrique » en afrique
case 3.2 » case 4.2, case 3.1, case 5.2

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

• Adding a wildcard symbol may retrieve word variants: technologies volume estimation ages case 3.2 communications costs _ developpement l afrique.*.