Perhaps you should try some spelling variations:
technology human » technology how, technology help
human population » urban population, urban populations
de communication » mobile communication, online communication
4 developpement » de developpement, le developpement, et developpement
developpement l » developpement il, developpement la, developpement de
population 3 » population _, population 1, population 2.3
l afrique » en afrique
price de » price _, price 3, price a
3 price » 3 prince, 2.3 price, 4.3 price
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 human population 3 price de communication costs 4 developpement l afrique.*.