Perhaps you should try some spelling variations:
communications series » communication series, communications services, communication services
der variation » de variation, does variation, die variation
typology der » typologie der, typologien der, typologie des
variation 6 » variation _, variations _, variation des
des afrique » en afrique, de l'afrique
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 der variation 6 costs data communications series _ developpement des afrique.*.