Perhaps you should try some spelling variations:
debt communication » de communication, et communication, get 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 debt » 4.1 der, 2.5 debt, 2.3 debt
a le » a les, a l, a e

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

• Performing a fuzzy search may retrieve terms with similar spellings: technologies _ innovation case 4.1 debt communication ((a le) OR (a la)) developpement la afrique.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "technologies _ innovation case 4.1 debt communication ((a le) OR (a la)) developpement la afrique.*".