Perhaps you should try some spelling variations:
mass communications » mass communication, data communications, crisis communications
typologies about » typologies art, typologie auf, typologies et
developpement de » developpement des, developpement durable
about radiation » about variation, body radiation
de afrique » de l'afrique, en afrique, l afrique
de mass » de masse, de mais, de masa
a net » a new, _ net, a neo
a et » a set, 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: "typologies about radiation _ de mass communications ((a et) OR (a net)) developpement de afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologies about radiation _ de mass communications ((a et) OR (a net)) developpement de afrique.*.