Perhaps you should try some spelling variations:
ley communications » kenya communications, cell communications, peru communications
developpement de » developpement des, developpement durable
information age » information storage, information access, information about
de afrique » de l'afrique, en afrique, l afrique
age de » page de, stage de, image de
de ley » de lezay
a set » _ set
a et » a net, a bet, a jet

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 de ley communications ((a et) OR (a set)) developpement de afrique.~".
• Adding a wildcard symbol may retrieve word variants: technologies _ information age de ley communications ((a et) OR (a set)) developpement de afrique.*.