Perhaps you should try some spelling variations:
oral communication » personal communication
developpements de » developpement de, developpement des, developpement du
a developpements » et developpements, au developpement, des developpements
variation using » variations during, variation und, variation among
de variation » der variation, die variation, does variation
typology de » typology _, typology 6, typology a
de afrique » de l'afrique, en afrique, l afrique
using es » using aes, using e, using 5s
es oral » vs oral, des moral, new oral
media a » media _, media 1, media 3

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

• Adding a wildcard symbol may retrieve word variants: typology de variation using es oral communication media a developpements de afrique.*.