Perhaps you should try some spelling variations:
open communication » human communication, 3 communication, 4 communication
modes variations » modes variation, modern variations, etudes variations
developpement en » developpement et, developpement des, developpement de
apology modes » apology do's, apology mea
der open » der oper, der opec, der tropen
3 deux » 2 deux

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 modes variations _ der open communication ((3 deux) OR (a deux)) developpement en afrique.~".
• Adding a wildcard symbol may retrieve word variants: apology modes variations _ der open communication ((3 deux) OR (a deux)) developpement en afrique.*.