Perhaps you should try some spelling variations:
developpement du » developpement de, developpement des, developpement et
4 communication » 3 communication, 5.4 communication, de communication
technologies 2 » technologies _, technologies 4
information a » information age, information about
du afrique » en afrique, l afrique, de l'afrique
4.4 data » 3.4 data, 2.4 data, 5.4 data
4.4 das » 2.4 das, 3.4 das
e 4 » eu 4

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 2 information a e 4 communication ((4.4 das) OR (4.4 data)) developpement du afrique.~".
• Adding a wildcard symbol may retrieve word variants: technologies 2 information a e 4 communication ((4.4 das) OR (4.4 data)) developpement du afrique.*.