Perhaps you should try some spelling variations:
oral communication » personal communication
ontologies based » ontology based, colonies based, ontologies a
communication 10 » communication 1, communication _, communication a
de developpement » sme development
based variation » based validation, based valuation, based vaccination
variation over » variation der, variation notes, variation des
des afrique » en afrique, de l'afrique
over der » cover der, over de, over air
der oral » der moral, der ort, der orte
10 de » 10 die, 10 der, 10 des

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

• Adding a wildcard symbol may retrieve word variants: ontologies based variation over der oral communication 10 de developpement des afrique.*.