Perhaps you should try some spelling variations:
population census » population density, population densities
2.2 communication » 2.3 communication, 3.2 communication, 2.7 communication
study population » student population, student populations, city population
4 developpement » de developpement, le developpement, et developpement
developpement l » developpement il, developpement la, developpement de
census france » century france, class france, census tract
france 2.2 » france 4.2, france 6.1, france 26
l afrique » en afrique
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 study population census france 2.2 communication costs 4 developpement l afrique.*.