Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
population census » population density, population densities
developpement du » developpement de, developpement des, developpement et
a developpement » au developpement, de developpement, le developpement
technology how » technology 1, technology 2.2, technology 3
how population » low population, slow population, new population
census price » cross price, census tract
du afrique » en afrique, l afrique, de l'afrique
costs a » costs _, costs 4

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

• Adding a wildcard symbol may retrieve word variants: technology how population census price data communications costs a developpement du afrique.*.