Perhaps you should try some spelling variations:
oral communication » personal communication
de developpement » sme development
developpement en » developpement et, developpement des, developpement de
der variation » de variation, does variation, die variation
variation his » variation des, variation im, variation i
typology der » typologie der, typologien der, typologie des
first oral » first organ, first deal, first drupal
his first » hits first, aids first, rris first
a de » a die, a der, a des

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

• Adding a wildcard symbol may retrieve word variants: typology der variation his first oral communication a de developpement en afrique.*.