Perhaps you should try some spelling variations:
communication services » telecommunications services
data communication » data communications
des developpement » des developpements, de developpement, le developpement
developpement en » developpement et, developpement des, developpement de
variation des » variation _, variation 6, variation series
services des » services does, services de, service des
costs data » cost data
des costs » gas costs, bus costs, d costs

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

• Adding a wildcard symbol may retrieve word variants: typology _ variation des costs data communication services des developpement en afrique.*.