Perhaps you should try some spelling variations:
den communication » open communication, lean communication, when communication
developpement la » developpement de, developpement et, developpement du
innovation case » innovation based, innovation chapter, innovation center
la afrique » l afrique, la fabrique, en afrique
case 4.1 » case 4.2, case 1
4.1 den » 4.1 der, 4.1 dex, 6.1 den
a du » a de, a u, _ du

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 _ innovation case 4.1 den communication ((a du) OR (a d)) developpement la afrique.~".
• Adding a wildcard symbol may retrieve word variants: technologies _ innovation case 4.1 den communication ((a du) OR (a d)) developpement la afrique.*.