Perhaps you should try some spelling variations:
2.3.1.1 communication » 2.2.5.4 communication, 3.4.1 communication, 6.2.4.1 communication
developpement la » developpement de, developpement et, developpement du
technology than » technology tax, technology trap, technology change
than population » change population, orphan population, urban population
population area » population age, population africa, population share
4 developpement » de developpement, le developpement, et developpement
fig 2.3.1.1 » fig 2.3.1.2, fig 2.3.1.3, fig 2.3.1.4
area fig » area cir
la farce » la force, la face, la france
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 than population area fig 2.3.1.1 communication costs 4 developpement la farce.*.