Perhaps you should try some spelling variations:
11.4.1 communication » 10.4.3 communication, 12.4.4 communication, 13.4.5 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
a developpement » au developpement, de developpement, le developpement
population per » population panel, population p230, population area
fig 11.4.1 » fig 11.1
per fig » per firm
costs a » costs _, costs 4
matrice. » matrices., maurice., patrice.

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

• Adding a wildcard symbol may retrieve word variants: technology than population per fig 11.4.1 communication costs a developpement la matrice.*.