Perhaps you should try some spelling variations:
developpement l » developpement il, developpement la, developpement de
technologies 2 » technologies _, technologies 4
innovation 3 » innovation 1, innovation 4
a disaster » _ disaster
l afrique » en afrique
2 de » 2 die, 2 der
_ de » _ der, _ den, _ do

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 2 innovation 3 a disaster community ((2 de) OR (_ de)) developpement l afrique.~".
• Adding a wildcard symbol may retrieve word variants: technologies 2 innovation 3 a disaster community ((2 de) OR (_ de)) developpement l afrique.*.