Perhaps you should try some spelling variations:
oral communication » personal communication
developpement l » developpement il, developpement la, developpement de
typologie de » typologie des, typologie der, typologien der
de variation » der variation, die variation, does variation
does oral » does formal, does oil
l afrique » en afrique
ai ai » ai a, ii ai, vi ai
a ai » _ ai, a a, a i

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 _ does oral communication ((a ai) OR (ai ai)) developpement l afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologie de variation _ does oral communication ((a ai) OR (ai ai)) developpement l afrique.*.