Perhaps you should try some spelling variations:
1973 communication » 13 communication, 1.3 communication, 19 communication
technology voice » technology choice, technology choices, technology volume
voice inflation » price inflation, core inflation, die inflation
inflation rates » inflation rate
4 developpement » de developpement, le developpement, et developpement
developpement l » developpement il, developpement la, developpement de
rates van » rates hans, rates a, rates a4
l afrique » en afrique
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 voice inflation rates van 1973 communication costs 4 developpement l afrique.*.