Perhaps you should try some spelling variations:
does development » dams development, ides development, smes development
communication 4 » communication _, communication a, communication 3
development de » development d, development ds, developpement de
variation des » variation _, variation 6, variation series
4 does » 2 does
dr ec » dr em, dr sc
dr et » dr em, fr et, ur et

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 des ((dr ec) OR (dr et)) communication 4 does development de l'afrique.~".
• Adding a wildcard symbol may retrieve word variants: typology _ variation des ((dr ec) OR (dr et)) communication 4 does development de l'afrique.*.