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
typologien does » typologie des, typologien der, typologie der
does variation » de variation, der variation, die variation
des personal » des personals, der personal, das personal
cross trade » crops trade, gross trade, across grade

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

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