Perhaps you should try some spelling variations:
personal communication » interpersonal communication
figures personal » cities personal, sources personal
zu developpement » du developpement, au developpement, ou developpement
developpement de » developpement des, developpement durable
communication 2 » communication _, communication a, communication 3
rheologie des » theologie des, theologie der, ideologie des
des variation » does variation, de variation, der variation
variation des » variation _, variation 6, variation series
2 zu » 2 zur, 2 zum

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

• Adding a wildcard symbol may retrieve word variants: rheologie des variation des figures personal communication 2 zu developpement de l'afrique.*.