Perhaps you should try some spelling variations:
oral communication » personal communication
a developpement » au developpement, de developpement, le developpement
how variation » how valuation, does variation, four variation
typology how » typology from, typology _, typology 4.1
des afrique » en afrique, de l'afrique
vs oral » u.s 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 how variation _ vs oral communication media a developpement des afrique.*.