Perhaps you should try some spelling variations:
cash communications » faso communications, data communications, cell communications
der developpement » de developpement, des developpements, leur developpement
communications a » communications _, communications law, communications media
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, 2 does, 1 does
4 does » 2 does
a der » _ der, 2 der, 3 der
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 (4 does)) cash communications a der developpement de afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologie des variation ((6 does) OR (4 does)) cash communications a der developpement de afrique.*.