Perhaps you should try some spelling variations:
technology century » technology center, technology centers, technology centered
century population » center population, country population, century cooperation
2.2 communication » 2.3 communication, 3.2 communication, 2.7 communication
population rates » population debates, population related, population data
au developpement » du developpement, de developpement, le developpement
developpement l » developpement il, developpement la, developpement de
rates case » rates cape, states case, rates east
l afrique » en afrique
case 2.2 » cases 2.2, case 4.2, case 2.3
costs au » costs a, costs amy, costs _

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

• Adding a wildcard symbol may retrieve word variants: technology century population rates case 2.2 communication costs au developpement l afrique.*.