Perhaps you should try some spelling variations:
model development » local development, social development, global development
technology trade » technology trends, technology transfer, technology transfers
de communication » mobile communication, online communication
communication en » communications en, communication et, communication el
development case » development china
trade relations » trade regulation
case africa » cases africa, care africa, curse africa
crisis de » crisis del, crisis due, crisis debt
en model » en mode, cern model, cnn model

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

• Adding a wildcard symbol may retrieve word variants: technology trade relations _ crisis de communication en model development case africa.*.