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
a developpement » au developpement, de developpement, le developpement
population tb » population b, population _, population 1
prices 3.2 » price 3.2, prices 3.1, prices 4.2
du afrique » en afrique, l afrique, de l'afrique
tb prices » do prices, 2 prices
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: technology world population tb prices 3.2 communication costs a developpement du afrique.*.