Perhaps you should try some spelling variations:
technology change » technological change, technological changes
change population » chinese population, age population, large population
au developpement » du developpement, de developpement, le developpement
9 communication » 3 communication, 4 communication, 1 communication
population les » population lives, population loss, population de
des afrique » en afrique, de l'afrique
costs au » costs a, costs amy, costs _
les can » les cas, holes can, les cinq
can 9 » can _, can a, can i

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

• Adding a wildcard symbol may retrieve word variants: technology change population les can 9 communication costs au developpement des afrique.*.