Perhaps you should try some spelling variations:
urban populations » urban population, rural populations
technology urban » technologies urban, technology uganda, sociology urban
3 communication » 4 communication, de communication, data communication
4 developpement » de developpement, le developpement, et developpement
developpement l » developpement il, developpement la, developpement de
populations 2 » populations _, populations a, populations 1
l afrique » en afrique
2 price » 2 prices, 2 prise, 2.2 price
price 3 » price _, price a, price 2.3
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 urban populations 2 price 3 communication costs 4 developpement l afrique.*.