Perhaps you should try some spelling variations:
oral communication » personal communication
developpement et » developpement des, developpement de, development east
variation dead » variation des, variation der, variation de
dead first » ideal first, dead fish, dead firms
first oral » first organ, first deal, first drupal
et afrique » en afrique, l afrique
a aus » _ aus, a auf, i aus
a au » a auf, a bau, a a

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

• Performing a fuzzy search may retrieve terms with similar spellings: typology _ variation dead first oral communication ((a au) OR (a aus)) developpement et afrique.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "typology _ variation dead first oral communication ((a au) OR (a aus)) developpement et afrique.*".