Perhaps you should try some spelling variations:
technology human » technology how, technology help
human population » urban population, urban populations
population house » population case, population change, population age
le developpement » de developpement, sme development
developpement de » developpement des, developpement durable
3 communication » 4 communication, de communication, data communication
house price » house prices
de afrique » de l'afrique, en afrique, 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 house price 3 communication costs le developpement de afrique.*.