Perhaps you should try some spelling variations:
personal communication » interpersonal communication
la developpement » le developpement, de developpement, et developpement
developpement en » developpement et, developpement des, developpement de
rheologie der » theologie der, rheologie des, ideologie der
der variation » de variation, does variation, die variation
variation 4 » variations 4, variation _, variation 6
4 personal » a personal, 1 personal, 1945 personal

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

• Adding a wildcard symbol may retrieve word variants: rheologie der variation 4 4 personal communication _ la developpement en afrique.*.