Perhaps you should try some spelling variations:
oral communication » personal communication
developpement l » developpement il, developpement la, developpement de
variation der » variation des, variation bei, variation _
l afrique » en afrique
new oral » new moral, knew moral, new rural
der new » under new, der neue
a der » _ der, 2 der, 3 der
a de » a die, a des, _ de

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