Perhaps you should try some spelling variations:
4.4 communication » 5.4 communication, 4.1 communication, 1.4 communication
technology rapid » technology rate, technology road, technology trap
rapid population » world population
developpement de » developpement des, developpement durable
a developpement » au developpement, de developpement, le developpement
population das » population data, population case, population de
das price » gas price, has price, gas prices
price 4.4 » price 2.3, practice 4.4
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 rapid population das price 4.4 communication costs a developpement de l'afrique.*.