Perhaps you should try some spelling variations:
debt communication » de communication, et communication, get communication
innovation case » innovation based, innovation chapter, innovation center
developpement l » developpement il, developpement la, developpement de
technologies 2 » technologies _, technologies 4
l afrique » en afrique
case 3.1 » case 4.1, case 3.2, case 1
3.1 debt » 3.1 det, 3.1 delta, 3.1 der
a ou » a u, a su, a zu
a o » a co

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

• Performing a fuzzy search may retrieve terms with similar spellings: technologies 2 innovation case 3.1 debt communication ((a ou) OR (a o)) developpement l afrique.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "technologies 2 innovation case 3.1 debt communication ((a ou) OR (a o)) developpement l afrique.*".