Perhaps you should try some spelling variations:
6.2.4.1 communication » 6.2.4.2 communication, 6.2.4.3 communication, 11.4.1 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
a developpement » au developpement, de developpement, le developpement
population per » population panel, population p230, population area
firm 6.2.4.1 » firma 2.4.1
la fabrice » la fabrique, la matrice, la farce
per firm » per form, pr firm, payer firm
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 than population per firm 6.2.4.1 communication costs a developpement la fabrice.*.