Perhaps you should try some spelling variations:
device communication » services communication, voice communication, mobile communication
developpement l » developpement il, developpement la, developpement de
typologie der » typologie des, ideologie der
der variation » de variation, does variation, die variation
variation 3 » variation _, variation 6, variation 5
debt device » debt service, debt services
l afrique » en afrique
3 debt » 83 debt, 4 debt, 2.3 debt
a der » _ der, 3 der, 1 der
2 der » _ der

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 der variation 3 debt device communication ((a der) OR (2 der)) developpement l afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologie der variation 3 debt device communication ((a der) OR (2 der)) developpement l afrique.*.