Perhaps you should try some spelling variations:
technology human » technology how, technology help
human population » urban population, urban populations
le developpement » de developpement, sme development
developpement du » developpement de, developpement des, developpement et
population case » population based, population age, population change
3 communication » 4 communication, de communication, data communication
case price » cause price, base price, base prices
du afrique » en afrique, l afrique, de l'afrique
costs le » costs _, costs 4, costs a
price 3 » price _, price a, price 2.3

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

• Adding a wildcard symbol may retrieve word variants: technology human population case price 3 communication costs le developpement du afrique.*.