Perhaps you should try some spelling variations:
personal communication » interpersonal communication
au developpement » du developpement, de developpement, le developpement
areal variation » spatial variation, annual variations, local variations
typology areal » typology alma
die personal » die personale, de personal, die persona
des afrique » en afrique, de l'afrique
a au » a auf, a bau, a aus

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

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