Perhaps you should try some spelling variations:
developpement durable » developpement de
communication costly » communication costs, communication costa, communications costs
trade developpement » trade developement, trade development, de developpement
debt communication » de communication, et communication, get communication
typologies de » typologien der, typologies _, typologie des
de variation » der variation, die variation, does variation
costly trade » costs trade, country trade, costly than
der debt » does debt, debt debt, der de

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

• Adding a wildcard symbol may retrieve word variants: typologies de variation _ der debt communication costly trade developpement durable afrique.*.