Perhaps you should try some spelling variations:
communications case » communication case, communications can, communications code
du developpement » de developpement, le developpement, et developpement
developpement et » developpement des, developpement de, development east
technologies a » technologies _, technologies 4, technologies 2
a innovation » 2 innovation, 3 innovation, 4 innovation
et afrique » en afrique, l afrique
case du » case d, case d1, case d2
day 4 » day 3, day _, day 2

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 a innovation _ ((day 4) OR (day 1)) communications case du developpement et afrique.~".
• Adding a wildcard symbol may retrieve word variants: technologies a innovation _ ((day 4) OR (day 1)) communications case du developpement et afrique.*.