Perhaps you should try some spelling variations:
communication series » communication services, communication systems, communication skills
data communication » data communications
modes variation » does variation, more variation, modern variations
variation 3 » variation _, variation 6, variation 5
des afrique » en afrique, de l'afrique
costs data » cost data
3 costs » 3 cost, 4 costs

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

• Adding a wildcard symbol may retrieve word variants: typology modes variation 3 costs data communication series _ developpement des afrique.*.