Perhaps you should try some spelling variations:
2.2 communication » 2.3 communication, 3.2 communication, 2.7 communication
study population » student population, student populations, city population
developpement du » developpement de, developpement des, developpement et
a developpement » au developpement, de developpement, le developpement
population de » population age, population _, population 1
france 2.2 » france 4.2, france 6.1, france 26
du afrique » en afrique, l afrique, de l'afrique
de france » en france
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 study population de france 2.2 communication costs a developpement du afrique.*.