Perhaps you should try some spelling variations:
1973 communication » 13 communication, 1.3 communication, 19 communication
technology change » technological change, technological changes
change inflation » change information, change innovation, change simulation
developpement de » developpement des, developpement durable
inflation rates » inflation rate
4 developpement » de developpement, le developpement, et developpement
de afrique » de l'afrique, en afrique, l afrique
rates can » rate can, rates cape, rates hans
can 1973 » van 1973, dan 1973, cara 1973
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technology change inflation rates can 1973 communication costs 4 developpement de afrique.*.