Perhaps you should try some spelling variations:
leur developpement » le developpement, deux developpements, de developpement
data communication » data communications
developpement en » developpement et, developpement des, developpement de
modes variation » does variation, more variation, modern variations
systems leur » systems lens, systems level, systems legal
variation 6 » variation _, variations _, variation des
cost data » test data
6 cost » 2 cost, 4 cost, 3 cost

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

• Adding a wildcard symbol may retrieve word variants: typology modes variation 6 cost data communication systems leur developpement en afrique.*.