Perhaps you should try some spelling variations:
personal communication » interpersonal communication
developpement du » developpement de, developpement des, developpement et
der variation » de variation, does variation, die variation
its personal » aids personal, its personnel, mtms personal
variation 4 » variations 4, variation _, variation 6
du afrique » en afrique, l afrique, de l'afrique
4 its » 4 it's, _ its, 2 its
a der » _ der, 2 der, 3 der
a de » a die, a des, _ de
theorie » theories

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "theorie der variation 4 its personal communication ((a de) OR (a der)) developpement du afrique.~".
• Adding a wildcard symbol may retrieve word variants: theorie der variation 4 its personal communication ((a de) OR (a der)) developpement du afrique.*.