Perhaps you should try some spelling variations:
technological changes » technological change, technological advances
changes inflation » cases inflation, wages inflation, change information
3.2 communication » 3 communication, 2.3 communication, de communication
a developpement » au developpement, de developpement, le developpement
inflation a » inflation _, inflation tax, inflation rate
des afrique » en afrique, de l'afrique
curve 3.2 » curve c3.2, curve 3.3, curve 3.3.2
a curve » _ curve, a cure, a curse
costs a » costs _, costs 4

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

• Adding a wildcard symbol may retrieve word variants: technological changes inflation a curve 3.2 communication costs a developpement des afrique.*.