Perhaps you should try some spelling variations:
developpement de » developpement des, developpement durable
innovation case » innovation based, innovation chapter, innovation center
d developpement » de developpement, du developpement, le developpement
technologies 4 » technologies _
4 innovation » 2 innovation, 3 innovation, der innovation
de afrique » de l'afrique, en afrique, l afrique
2.1 et » 2.1 eu
2.1 el » 2.1 eu, 1.1 el, 3.1 el

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "technologies 4 innovation case ((2.1 et) OR (2.1 el)) communication a d developpement de afrique.~".
• Adding a wildcard symbol may retrieve word variants: technologies 4 innovation case ((2.1 et) OR (2.1 el)) communication a d developpement de afrique.*.