Perhaps you should try some spelling variations:
developpement durable » developpement de
oral communication » personal communication
der variation » de variation, does variation, die variation
variation der » variation des, variation bei, variation _
typology der » typologie der, typologien der, typologie des
new oral » new moral, knew moral, new rural
der new » under new, der neue
a le » a les, a la, a e
a l » a la

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 der variation der new oral communication ((a le) OR (a l)) developpement durable afrique.~".
• Adding a wildcard symbol may retrieve word variants: typology der variation der new oral communication ((a le) OR (a l)) developpement durable afrique.*.