Perhaps you should try some spelling variations:
verbal communication » nonverbal communication, virtual communication, oral communication
des developpements » deux developpements, de developpement, et developpements
developpements en » developpement en, developpement et, developpements de
variation among » starvation among, formation among, variation von
mothers verbal » models verbal
typologien de » typologien der, typologie des, typologie der
among mothers » among other, among northern, young mothers
de variation » der variation, die variation, does variation
a des » a der, a das

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

• Adding a wildcard symbol may retrieve word variants: typologien de variation among mothers verbal communication a des developpements en afrique.*.