Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
3.1 communications » 3.1 communication, 4.1 communication, 1.1 communication
technological gap » technological gaps, technological gains, technological arab
innovation rates » innovation rate, innovation notes, innovation race
developpement la » developpement de, developpement et, developpement du
a developpement » au developpement, de developpement, le developpement
gap innovation » harp innovation, up innovation, eat innovation
rates case » rates cape, states case, rates east
la afrique » l afrique, la fabrique, en afrique
case 3.1 » case 4.1, case 3.2, case 1
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 gap innovation rates case 3.1 communications costs a developpement la afrique.*.