Perhaps you should try some spelling variations:
mass communications » mass communication, data communications, crisis communications
typologies about » typologies art, typologie auf, typologies et
developpement et » developpement des, developpement de, development east
about variation » about radiation
et afrique » en afrique, l afrique
dem mass » term mass, dem mis
a bet » a best, a bent, a beta
a et » a set, a net, 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 variation _ dem mass communications ((a et) OR (a bet)) developpement et afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologies about variation _ dem mass communications ((a et) OR (a bet)) developpement et afrique.*.