Perhaps you should try some spelling variations:
developpement de » developpement des, developpement durable
typologies 4 » typologies _, topologies 4, typologies 3
4 variation » 2 variation, 4 validation
de afrique » de l'afrique, en afrique, l afrique
dem risk » dam risk, dem risiko, term risk
a set » _ set
a et » a net, a bet, a jet

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: "typologies 4 variation _ dem risk communication ((a et) OR (a set)) developpement de afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologies 4 variation _ dem risk communication ((a et) OR (a set)) developpement de afrique.*.