Perhaps you should try some spelling variations:
open communication » human communication, 3 communication, 4 communication
der developpement » de developpement, des developpements, leur developpement
developpement de » developpement des, developpement durable
communication 4 » communication _, communication a, communication 3
de variation » der variation, die variation, does variation
typology de » typology _, typology 6, typology a
variation 6 » variation _, variations _, variation des
der open » der oper, der opec, der tropen
6 der » _ der, 2 der, 3 der
4 der » _ der, 2 der, 3 der

You may be able to get more results by adjusting your search query.

• Adding a wildcard symbol may retrieve word variants: typology de variation 6 der open communication 4 der developpement de l'afrique.*.