Perhaps you should try some spelling variations:
2.3.1.3 communication » 2.3.1.1 communication, 2.2.3 communication, 2.2.5.4 communication
developpement en » developpement et, developpement des, developpement de
technology boar » technology book, technology best, technology 4ir
boar population » boar populations, boor population, poor population
population per » population panel, population p230, population area
firm 2.3.1.3 » fig 2.3.1.3, firm 2.3.5, firm 4.1.3
per firm » per form, pr firm, payer firm

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

• Adding a wildcard symbol may retrieve word variants: technology boar population per firm 2.3.1.3 communication costs _ developpement en france.*.