Perhaps you should try some spelling variations:
device communication » services communication, voice communication, mobile communication
du developpement » de developpement, le developpement, et developpement
typologie de » typologie des, typologie der, typologien der
de variation » der variation, die variation, does variation
des afrique » en afrique, de l'afrique
6 real » 4 real, 2 real, 3 real
a du » a d, a de, a u

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 de variation ((6 real) OR (1 real)) device communication a du developpement des afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologie de variation ((6 real) OR (1 real)) device communication a du developpement des afrique.*.