Perhaps you should try some spelling variations:
oral communication » personal communication
au developpement » du developpement, de developpement, le developpement
how variation » how valuation, does variation, four variation
des l'afrique » de l'afrique, de l'amerique
typology how » typology from, typology _, typology 4.1
variation du » variation due, variations du, variation de
first oral » first organ, first deal, first drupal
du first » d first, der first, 2 first

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

• Adding a wildcard symbol may retrieve word variants: typology how variation du first oral communication _ au developpement des l'afrique.*.