Perhaps you should try some spelling variations:
personal communication » interpersonal communication
developpement durable » developpement de
des developpement » des developpements, de developpement, le developpement
variation being » variation bei, variation using, variation among
typologie does » typologie des, typologie der, typologie cices
does variation » de variation, der variation, die variation
maybe personal » manage personal, have personal, more personal
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: typologie does variation being maybe personal communication a des developpement durable afrique.*.