Perhaps you should try some spelling variations:
18 communication » 1 communication, 10 communication, 13 communication
developpement et » developpement des, developpement de, development east
information age » information storage, information access, information about
et afrique » en afrique, l afrique
age dem » age de
dem 18 » dem 19

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 _ information age dem 18 communication ((a l) OR (a la)) developpement et afrique.~".
• Adding a wildcard symbol may retrieve word variants: technologies _ information age dem 18 communication ((a l) OR (a la)) developpement et afrique.*.