Perhaps you should try some spelling variations:
personal communication » interpersonal communication
le developpement » de developpement, sme development
developpement en » developpement et, developpement des, developpement de
variation among » starvation among, formation among, variation von
typologie der » typologie des, ideologie der
der variation » de variation, does variation, die variation
15 personal » 1.5 personal, 1 personal, 12 personal
among 15 » among _, among eu

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

• Adding a wildcard symbol may retrieve word variants: typologie der variation among 15 personal communication _ le developpement en afrique.*.