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
developpement l » developpement il, developpement la, developpement de
variation der » variation des, variation bei, variation _
l afrique » en afrique
den oral » den ort, new oral
der den » oder den, der de, der der
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 der den oral communication 10 de developpement l afrique.*.