Perhaps you should try some spelling variations:
developpement du » developpement de, developpement des, developpement et
communication 1 » communication _, communication a, communication 3
3 developpement » de developpement, le developpement, et developpement
variation 6 » variation _, variations _, variation des
firms rural » firm rural
firms oral » firms deal, firms global
du afrique » en afrique, l afrique, de l'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 6 ((firms oral) OR (firms rural)) communication 1 3 developpement du afrique.~".
• Adding a wildcard symbol may retrieve word variants: typology _ variation 6 ((firms oral) OR (firms rural)) communication 1 3 developpement du afrique.*.