Perhaps you should try some spelling variations:
personal communication » interpersonal communication
die developpement » de developpement, le developpement, du developpement
die personal » die personale, de personal, die persona
a variables » a variable, 3 variables, 2 variables
variables 3 » variables _, variables 4, variables 2.3
des afrique » en afrique, de l'afrique
typology a » typology _, typology 6, theology a
3 die » 2 die

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

• Adding a wildcard symbol may retrieve word variants: typology a variables 3 die personal communication _ die developpement des afrique.*.