Perhaps you should try some spelling variations:
open communication » human communication, 3 communication, 4 communication
developpement en » developpement et, developpement des, developpement de
mea variation » de variation, der variation, a variation
variation 2 » variation 27, variation _, variation 6
der open » der oper, der opec, der tropen
2 der » _ der
3 die » 2 die, _ die
3 de » 3 der, 3 des, _ de
apology » typology, topology

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: "apology mea variation 2 der open communication ((3 de) OR (3 die)) developpement en afrique.~".
• Adding a wildcard symbol may retrieve word variants: apology mea variation 2 der open communication ((3 de) OR (3 die)) developpement en afrique.*.