Perhaps you should try some spelling variations:
personal communication » interpersonal communication
communication gross » communication cross, communication across, communications cross
trade developpement » trade developement, trade development, de developpement
typologien der » typologie der, typologie des, apologien der
der variation » de variation, does variation, die variation
des personal » des personals, der personal, das personal
gross trade » goods trade, crops trade, growth trade
des afrique » en afrique, de l'afrique

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

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