Perhaps you should try some spelling variations:
communication 3.3 » communication _, communication a, communication 1
der developpement » de developpement, des developpements, leur developpement
1 communication » 10 communication, 3 communication, 4 communication
developpement l » developpement il, developpement la, developpement de
l afrique » en afrique
3.3 der » 2.3 der, 4.3 der
und e » und _, und 2, und b
und 3 » und _, und 2

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: "technologies _ informations ((und e) OR (und 3)) 1 communication 3.3 der developpement l afrique.~".
• Adding a wildcard symbol may retrieve word variants: technologies _ informations ((und e) OR (und 3)) 1 communication 3.3 der developpement l afrique.*.