Perhaps you should try some spelling variations:
technology gaps » technology gap
inflation rates » inflation rate
4 communication » 3 communication, 5.4 communication, de communication
a developpement » au developpement, de developpement, le developpement
gaps inflation » has inflation, grade inflation, rapid inflation
des afrique » en afrique, de l'afrique
rates case » rates cape, states case, rates east
costs a » costs _, costs 4
case 4 » case 1, case 2, case 3

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

• Adding a wildcard symbol may retrieve word variants: technology gaps inflation rates case 4 communication costs a developpement des afrique.*.