Perhaps you should try some spelling variations:
leur developpement » le developpement, deux developpements, de developpement
data communication » data communications
die variation » de variation, does variation, der variation
des l'afrique » de l'afrique, de l'amerique
typology die » typology _, typology 4.1, typology 6
variation 6 » variation _, variations _, variation 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 media leur developpement des l'afrique.*.