Perhaps you should try some spelling variations:
oral communication » personal communication
does developpement » de developpement, des developpements, does development
developpement en » developpement et, developpement des, developpement de
variation des » variation _, variation 6, variation series
typologie 2 » topologie 2, typologies _, typologie et
2 variation » 2 variations
den oral » den ort, new oral
des den » es den, des dem, des der
a does » 2 does, 4 does, 1 does

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

• Adding a wildcard symbol may retrieve word variants: typologie 2 variation des den oral communication a does developpement en afrique.*.