Perhaps you should try some spelling variations:
de communication » mobile communication, online communication
developpement de » developpement des, developpement durable
innovation 12.3 » innovation 1.2.3, innovation 2.3, innovation 1.3
de afrique » de l'afrique, en afrique, l afrique
12.3 does » 18.3 does, 2.3 does, 12.3 die
does de » does debt
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 12.3 does de communication ((a du) OR (a d)) developpement de afrique.~".
• Adding a wildcard symbol may retrieve word variants: technologies _ innovation 12.3 does de communication ((a du) OR (a d)) developpement de afrique.*.