Perhaps you should try some spelling variations:
oral communication » personal communication
does development » dams development, ides development, smes development
variation over » variation der, variation notes, variation des
development en » developpement en, development menu, development eco
des variation » does variation, de variation, der variation
over der » cover der, over de, over air
der oral » der moral, der ort, der orte
typologie » typologies, typology

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

• Adding a wildcard symbol may retrieve word variants: typologie des variation over der oral communication _ does development en afrique.*.