Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
technologies volume » technology volume, technologies policies
volume inflation » volume ventilation, volume evaluation, core inflation
developpement de » developpement des, developpement durable
inflation rules » inflation rates, information rules, inflation causes
4 developpement » de developpement, le developpement, et developpement
de afrique » de l'afrique, en afrique, l afrique
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: technologies volume inflation rules trade _ communications costs 4 developpement de afrique.*.