Perhaps you should try some spelling variations:
variation series » education series, action series, edition series
de developpement » sme development
developpement l » developpement il, developpement la, developpement de
apologien der » typologien der, apologie des, ideologien der
der variation » de variation, does variation, die variation
l afrique » en afrique
a oral » _ oral, 4 oral, 1 oral
2 oral » _ oral, 4 oral
a de » a die, a der, a des

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: "apologien der variation series ((a oral) OR (2 oral)) communication a de developpement l afrique.~".
• Adding a wildcard symbol may retrieve word variants: apologien der variation series ((a oral) OR (2 oral)) communication a de developpement l afrique.*.