Perhaps you should try some spelling variations:
personal communication » interpersonal communication
le developpement » de developpement, sme development
developpement de » developpement des, developpement durable
rheologie die » theologie die, rheologie des, archaologie die
die variation » de variation, does variation, der variation
variation 4 » variations 4, variation _, variation 6
de afrique » de l'afrique, en afrique, l afrique

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

• Adding a wildcard symbol may retrieve word variants: rheologie die variation 4 a personal communication _ le developpement de afrique.*.