Perhaps you should try some spelling variations:
integration model » integration models, integrative model, interaction model
4 communication » 3 communication, 5.4 communication, de communication
developpement l » developpement il, developpement la, developpement de
e integration » de integration, re integration, 2e integration
technology e » technology 1, technology 3, technology 4
model trade » modern trade, model traem, model tree
l afrique » en afrique
trade 4 » trade _, trade a

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

• Adding a wildcard symbol may retrieve word variants: technology e integration model trade 4 communication costs _ developpement l afrique.*.