Perhaps you should try some spelling variations:
verbal communication » nonverbal communication, virtual communication, oral communication
trade development » software development
variation using » variations during, variation und, variation among
development en » developpement en, development menu, development eco
des variation » does variation, de variation, der variation
aes verbal » des verbal, a verbal, des verbalen
using aes » using ae, using als, using bayes
typologie » typologies, typology

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

• Adding a wildcard symbol may retrieve word variants: typologie des variation using aes verbal communication a trade development en afrique.*.