Perhaps you should try some spelling variations:
personal communication » interpersonal communication
variation series » education series, action series, edition series
de developpement » sme development
developpement en » developpement et, developpement des, developpement de
typologie der » typologie des, ideologie der
der variation » de variation, does variation, die variation
4 personal » a personal, 1 personal, 1945 personal
series 4 » series _, series 1, series 2

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

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