Perhaps you should try some spelling variations:
1.1 communication » 4.1 communication, 1.3 communication, 1.4 communication
study population » student population, student populations, city population
et developpement » de developpement, le developpement, test development
developpement la » developpement de, developpement et, developpement du
population case » population based, population age, population change
case france » trade france, marie france, state france
france 1.1 » france 11.1, france 6.1, france 4.1
la afrique » l afrique, la fabrique, en afrique
costs et » costs _, costs 4, costs a

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

• Adding a wildcard symbol may retrieve word variants: technology study population case france 1.1 communication costs et developpement la afrique.*.