Perhaps you should try some spelling variations:
verbal communication » nonverbal communication, virtual communication, oral communication
communication medien » communication media, communication medium, communication mediums
separation among » separation using, starvation among, cooperation among
du developpement » de developpement, le developpement, et developpement
developpement de » developpement des, developpement durable
ree separation » rate separation, grade separation, order separation
typology ree » typology from, typology _, typology 4.1
de afrique » de l'afrique, en afrique, l afrique
medien du » medien der, medien des, medien das

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

• Adding a wildcard symbol may retrieve word variants: typology ree separation among boys verbal communication medien du developpement de afrique.*.