Perhaps you should try some spelling variations:
oral communication » personal communication
des developpements » deux developpements, de developpement, et developpements
developpements en » developpement en, developpement et, developpements de
variation using » variations during, variation und, variation among
de variation » der variation, die variation, does variation
apologia de » tipologia de, apologie des, apologia _
a des » a der, a das

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

• Adding a wildcard symbol may retrieve word variants: apologia de variation using deep oral communication a des developpements en afrique.*.