Perhaps you should try some spelling variations:
leur developpement » le developpement, deux developpements, de developpement
developpement en » developpement et, developpement des, developpement de
3 communication » 4 communication, de communication, data communication
communication 5 » communication _, communication a, communication 3
typologies de » typologien der, typologies _, typologie des
de variation » der variation, die variation, does variation
did do » aid do
5 leur » a leur

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: "typologies de variation ((did so) OR (did do)) 3 communication 5 leur developpement en afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologies de variation ((did so) OR (did do)) 3 communication 5 leur developpement en afrique.*.