Perhaps you should try some spelling variations:
communication layer » communication law, communication united
oral communication » personal communication
le developpement » de developpement, sme development
developpement en » developpement et, developpement des, developpement de
variation using » variations during, variation und, variation among
typologie der » typologie des, ideologie der
der variation » de variation, does variation, die variation
new oral » new moral, knew moral, new rural
layer le » layer l2, layer l3, layer l4

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

• Adding a wildcard symbol may retrieve word variants: typologie der variation using new oral communication layer le developpement en afrique.*.