Perhaps you should try some spelling variations:
cat communications » data communications, chad communications, haiti communications
communications a » communications _, communications law, communications media
du developpement » de developpement, le developpement, et developpement
developpement de » developpement des, developpement durable
des variation » does variation, de variation, der variation
de afrique » de l'afrique, en afrique, l afrique
6 does » 16 does, 4 does, 1 does
2 does » 4 does
a du » a d, a de, a u
typologie » typologies, typology

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: "typologie des variation ((6 does) OR (2 does)) cat communications a du developpement de afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologie des variation ((6 does) OR (2 does)) cat communications a du developpement de afrique.*.