Perhaps you should try some spelling variations:
communication costo » communication costs, communication costa, communications costs
4.1 communication » 4 communication, 2.3 communication, 3.2 communication
del developpement » de developpement, des developpements, le developpement
developpement l » developpement il, developpement la, developpement de
trade 4.1 » trade 2.2, trade 3.2
costo del » costa del, cose del, costo e
l afrique » en afrique
3 trade » 1 trade, 4 trade, 2 trade

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

• Adding a wildcard symbol may retrieve word variants: technology _ integration 3 trade 4.1 communication costo del developpement l afrique.*.