Perhaps you should try some spelling variations:
leur developpement » le developpement, deux developpements, de developpement
technologies much » technologies co, technologies m, technologies may
developpement de » developpement des, developpement durable
formation using » information using, formation during, formation among
much formation » much information, path formation, rock formation
de afrique » de l'afrique, en afrique, l afrique
using a » using _

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

• Adding a wildcard symbol may retrieve word variants: technologies much formation using a risk communication a leur developpement de afrique.*.