Perhaps you should try some spelling variations:
personal communication » interpersonal communication
communication cross » communication costs
trade developpement » trade developement, trade development, de developpement
developpement en » developpement et, developpement des, developpement de
des variation » does variation, de variation, der variation
ex personal » e personal, der personal, des personal
cross trade » crops trade, gross trade, across grade
typologie » typologies, typology

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

• Adding a wildcard symbol may retrieve word variants: typologie des variation _ ex personal communication cross trade developpement en afrique.*.