Perhaps you should try some spelling variations:
developpement de » developpement des, developpement durable
typologies la » typologies _, typologies 3, typologies et
la validation » a validation, plan validation, _ validation
de afrique » de l'afrique, en afrique, l afrique
our data » your data, poor data, war data
a bet » a best, a bent, a beta
a et » a set, a net, 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 la validation _ our data communications ((a et) OR (a bet)) developpement de afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologies la validation _ our data communications ((a et) OR (a bet)) developpement de afrique.*.