Perhaps you should try some spelling variations:
personal communication » interpersonal communication
developpement durable » developpement de
tfeu developpement » de developpement, le developpement, et developpement
ideologie der » ideologie und, typologie der
der variation » de variation, does variation, die variation
variation bei » variation des, variation der, variation _
des personal » des personals, der personal, das personal
bei des » bei der, bei den, bei dem
a tfeu » _ tfeu

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

• Adding a wildcard symbol may retrieve word variants: ideologie der variation bei des personal communication a tfeu developpement durable afrique.*.