Perhaps you should try some spelling variations:
service communicating » services communicating, services communication, device communication
developpement de » developpement des, developpement durable
des variation » does variation, de variation, der variation
variation 3 » variation _, variation 6, variation 5
de afrique » de l'afrique, en afrique, l afrique
3 debt » 83 debt, 4 debt, 2.3 debt
a der » _ der, 2 der, 3 der
a de » a die, a des, _ de
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 3 debt service communicating ((a de) OR (a der)) developpement de afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologie des variation 3 debt service communicating ((a de) OR (a der)) developpement de afrique.*.