Perhaps you should try some spelling variations:
communication costly » communication costs, communication costa, communications costs
punkt communication » put communication, audit communication, post communication
trade developpement » trade developement, trade development, de developpement
des variation » does variation, de variation, der variation
costly trade » costs trade, country trade, costly than
variation a » variation _, variation 6, variation 5
des afrique » en afrique, de l'afrique
der punkt » der punkte
a der » _ der, 2 der, 3 der
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 a der punkt communication costly trade developpement des afrique.*.