Perhaps you should try some spelling variations:
oral communication » personal communication
developpement du » developpement de, developpement des, developpement et
variation behn » variation bei, variation des, variation der
apologien der » typologien der, apologie des, ideologien der
der variation » de variation, does variation, die variation
du afrique » en afrique, l afrique, de l'afrique
behn does » being does, ban does
does oral » does formal, does oil
a us » a u.s, _ us, a un
a u » a un

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: "apologien der variation behn does oral communication ((a u) OR (a us)) developpement du afrique.~".
• Adding a wildcard symbol may retrieve word variants: apologien der variation behn does oral communication ((a u) OR (a us)) developpement du afrique.*.