Perhaps you should try some spelling variations:
oral communication » personal communication
developpement de » developpement des, developpement durable
des variation » does variation, de variation, der variation
variation 6 » variation _, variations _, variation des
de afrique » de l'afrique, en afrique, l afrique
doch oral » doch egal
3 el » y el
_ el » _ eu, _ e, _ ex
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 6 doch oral communication ((3 el) OR (_ el)) developpement de afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologie des variation 6 doch oral communication ((3 el) OR (_ el)) developpement de afrique.*.