Perhaps you should try some spelling variations:
4 developpement » de developpement, le developpement, et developpement
developpement l » developpement il, developpement la, developpement de
interaction ii » interaction ai, interaction i, interaction hci
4 interaction » 4 interactions, 2 interaction, 3 interaction
technology 4 » technology _, technology 1, technology 3
ii political » iii political, i political, 2 political
l afrique » en afrique
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technology 4 interaction ii political _ communication costs 4 developpement l afrique.*.