Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
4.2 communications » 4.2 communication, 3.2 communication, 6.2 communication
collection peace » collection case, collection care, collection plan
developpement et » developpement des, developpement de, development east
technology la » technology law, technology lag, technology land
la collection » a collection, data collection, bill collection
peace treaty » peace treaties, trade treaty
treaty 4.2 » treaty 4.1
et afrique » en afrique, l afrique

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

• Adding a wildcard symbol may retrieve word variants: technology la collection peace treaty 4.2 communications costs _ developpement et afrique.*.