Perhaps you should try some spelling variations:
3.2 communication » 3 communication, 2.3 communication, de communication
interaction have » interaction aware, interaction layer, interaction a
le developpement » de developpement, sme development
developpement l » developpement il, developpement la, developpement de
have trade » slave trade, have made
trade 3.2 » trade 2.2, trade 2, trade 4.1
l afrique » en afrique
costs le » costs _, costs 4, costs a

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

• Adding a wildcard symbol may retrieve word variants: technology _ interaction have trade 3.2 communication costs le developpement l afrique.*.