Perhaps you should try some spelling variations:
oral communication » personal communication
developpement et » developpement des, developpement de, development east
des variation » does variation, de variation, der variation
rates oral » rates formal, rates rural, rates brazil
et afrique » en afrique, l afrique
a der » _ der, 3 der, 1 der
2 der » _ der
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 _ rates oral communication ((a der) OR (2 der)) developpement et afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologie des variation _ rates oral communication ((a der) OR (2 der)) developpement et afrique.*.