Perhaps you should try some spelling variations:
information source » information sources, information resource, information resources
oral communication » personal communication
de developpement » sme development
developpement de » developpement des, developpement durable
communication 3 » communication _, communication a
technologies 2 » technologies _, technologies 4
source how » resource how, source host
de africa » does africa, de america, use africa
how oral » how moral, how rural, how arab
3 de » 3 die, 3 der, 3 des

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

• Adding a wildcard symbol may retrieve word variants: technologies 2 information source how oral communication 3 de developpement de africa.*.