Perhaps you should try some spelling variations:
under developpement » under development, de developpement, un developpement
oral communication » personal communication
communication 13 » communication 1.3, communication 3, communication 1
developpement en » developpement et, developpement des, developpement de
typologien does » typologie des, typologien der, typologie der
does variation » de variation, der variation, die variation
13 under » 10 under, 3.3 under, 13 und
es oral » vs oral, des moral, new oral

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

• Adding a wildcard symbol may retrieve word variants: typologien does variation _ es oral communication 13 under developpement en afrique.*.