Perhaps you should try some spelling variations:
personal communication » interpersonal communication
der developpement » de developpement, des developpements, leur developpement
developpement de » developpement des, developpement durable
variation plan » variation law, variation a, variation von
tones personal » roles personal, son's personal, states personal
ideologie der » ideologie und, typologie der
der variation » de variation, does variation, die variation
plan tones » plan does, plan eines, plan types
a der » _ der, 2 der, 3 der

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

• Adding a wildcard symbol may retrieve word variants: ideologie der variation plan tones personal communication a der developpement de l'afrique.*.