Perhaps you should try some spelling variations:
trade developpement » trade developement, trade development, de developpement
oral communication » personal communication
developpement en » developpement et, developpement des, developpement de
ideologie de » ideologie der, ideologie des, ideologie du
de variation » der variation, die variation, does variation
costs trade » costly trade
2 oral » _ oral, 4 oral

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

• Adding a wildcard symbol may retrieve word variants: ideologie de variation _ 2 oral communication costs trade developpement en afrique.*.