Perhaps you should try some spelling variations:
open communication » human communication, 3 communication, 4 communication
developpements en » developpement en, developpement et, developpements de
des variation » does variation, de variation, der variation
typology des » typologie des, typologie der, typology _
variation 6 » variation _, variations _, variation des
der open » der oper, der opec, der tropen
6 der » _ der, 2 der, 3 der
a das » 1 das, 3 das, _ das
2 das » 1 das

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: "typology des variation 6 der open communication ((a das) OR (2 das)) developpements en afrique.~".
• Adding a wildcard symbol may retrieve word variants: typology des variation 6 der open communication ((a das) OR (2 das)) developpements en afrique.*.