Perhaps you should try some spelling variations:
16.4 communication » 1.4 communication, 6.4 communication, 5.4 communication
trade information » price information, private information, trade integration
information rates » information states, information ratio, information rules
technology trade » technology trends, technology transfer, technology transfers
developpement l » developpement il, developpement la, developpement de
rates maps » rate maps, states maps, notes maps
maps 16.4 » maps 1.4, maps 1.3.4, maps 3.4
l afrique » en afrique

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

• Adding a wildcard symbol may retrieve word variants: technology trade information rates maps 16.4 communication costs _ developpement l afrique.*.