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

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

• Adding a wildcard symbol may retrieve word variants: typologien die variation _ ex personal communication cross trade developpement et afrique.*.