Perhaps you should try some spelling variations:
oral communication » personal communication
developpement l » developpement il, developpement la, developpement de
typologien de » typologien der, typologie des, typologie der
de variation » der variation, die variation, does variation
does oral » does formal, does oil
l afrique » en afrique
4.1 ai » 2.1 ai, 3.1 ai, 4.1 agri
1.1 ai » 1.1 aim, 2.1 ai, 3.1 ai

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: "typologien de variation _ does oral communication ((4.1 ai) OR (1.1 ai)) developpement l afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologien de variation _ does oral communication ((4.1 ai) OR (1.1 ai)) developpement l afrique.*.