Perhaps you should try some spelling variations:
oral communication » personal communication
developpement la » developpement de, developpement et, developpement du
variation 4 » variations 4, variation _, variation 6
firms oral » firms rural, firms deal, firms global
la afrique » l afrique, la fabrique, en afrique
4 firms » 4.1 firms, 4.5 firms, 4.6 firms
pt 3 » pt 1

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 4 firms oral communication ((pt 3) OR (pt 2)) developpement la afrique.~".
• Adding a wildcard symbol may retrieve word variants: typology _ variation 4 firms oral communication ((pt 3) OR (pt 2)) developpement la afrique.*.