Perhaps you should try some spelling variations:
3.2 communication » 3 communication, 2.3 communication, de communication
technology world » technology work, technological world, technology working
developpement du » developpement de, developpement des, developpement et
4 developpement » de developpement, le developpement, et developpement
population b » population _, population 1, population 3
prices 3.2 » price 3.2, prices 3.1, prices 4.2
du afrique » en afrique, l afrique, de l'afrique
b prices » 2 prices, b price, do prices
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 world population b prices 3.2 communication costs 4 developpement du afrique.*.