Perhaps you should try some spelling variations:
oral communication » personal communication
communication 1 » communication _, communication a, communication 3
3 developpement » de developpement, le developpement, et developpement
variation do » variation de, variation du, variation des
firms oral » firms rural, firms deal, firms global
il afrique » en afrique
l afrique » en afrique

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: "typology _ variation do firms oral communication 1 3 developpement ((il afrique) OR (l afrique)).~".
• Adding a wildcard symbol may retrieve word variants: typology _ variation do firms oral communication 1 3 developpement ((il afrique) OR (l afrique)).*.