Perhaps you should try some spelling variations:
communication services » telecommunications services
data communication » data communications
du developpement » de developpement, le developpement, et developpement
developpement de » developpement des, developpement durable
die variation » de variation, does variation, der variation
typology die » typology _, typology 4.1, typology 6
variation 6 » variation _, variations _, variation des
services du » services de, services do, services des
costs data » cost data
6 costs » 3 costs, 4 costs, 6 cost

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

• Adding a wildcard symbol may retrieve word variants: typology die variation 6 costs data communication services du developpement de l'afrique.*.