Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
interaction cards » interaction terms, interaction counts, interaction forces
developpement du » developpement de, developpement des, developpement et
a developpement » au developpement, de developpement, le developpement
cards trade » arms trade, carry trade, carbon trade
du afrique » en afrique, l afrique, de l'afrique
costs a » costs _, costs 4

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

• Adding a wildcard symbol may retrieve word variants: technology _ interaction cards trade data communications costs a developpement du afrique.*.