Perhaps you should try some spelling variations:
data communication » data communications
developpement en » developpement et, developpement des, developpement de
des variation » does variation, de variation, der variation
und data » fund data, wind data, und daten
a auf » i auf, b auf
a au » a bau, a aus, a a
typologie » typologies, typology

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: "typologie des variation _ und data communication ((a au) OR (a auf)) developpement en afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologie des variation _ und data communication ((a au) OR (a auf)) developpement en afrique.*.