Perhaps you should try some spelling variations:
formal communication » informal communication, oral communication, moral communication
de developpement » sme development
developpement en » developpement et, developpement des, developpement de
variation using » variations during, variation und, variation among
des variation » does variation, de variation, der variation
typology des » typologie des, typologie der, typology _
aes formal » rates formal, less formal, als formale
using aes » using ae, using als, using bayes

You may be able to get more results by adjusting your search query.

• Adding a wildcard symbol may retrieve word variants: typology des variation using aes formal communication _ de developpement en afrique.*.