Perhaps you should try some spelling variations:
trends developpement » trends development, trends developments, en developpement
oral communication » personal communication
developpement en » developpement et, developpement des, developpement de
des variation » does variation, de variation, der variation
costs trends » cost trends, loss trends, tests trends
variation 6 » variation _, variations _, variation des
des oral » des moral, des oil, des orts
6 des » 26 des, 6 does, 6 der
typologie » typologies, typology

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

• Adding a wildcard symbol may retrieve word variants: typologie des variation 6 des oral communication costs trends developpement en afrique.*.