Perhaps you should try some spelling variations:
open communication » human communication, 3 communication, 4 communication
developpement l » developpement il, developpement la, developpement de
des variation » does variation, de variation, der variation
l afrique » en afrique
der open » der oper, der opec, der tropen
a des » a der, a das
a de » a die, a der, _ 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 _ der open communication ((a de) OR (a des)) developpement l afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologie des variation _ der open communication ((a de) OR (a des)) developpement l afrique.*.