Perhaps you should try some spelling variations:
oral communication » personal communication
leur developpement » le developpement, deux developpements, de developpement
variation series » education series, action series, edition series
developpement l » developpement il, developpement la, developpement de
series des » series de, series d, series e
l afrique » en afrique
des oral » des moral, des oil, des orts

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

• Adding a wildcard symbol may retrieve word variants: typology _ variation series des oral communication a leur developpement l afrique.*.