Perhaps you should try some spelling variations:
2.3.1.2 communication » 2.3.1.1 communication, 2.2.5.4 communication, 3.2.3.2 communication
technology trade » technology trends, technology transfer, technology transfers
trade population » create population, france population, age population
developpement en » developpement et, developpement des, developpement de
a developpement » au developpement, de developpement, le developpement
population per » population panel, population p230, population area
fig 2.3.1.2 » fig 2.3.1.3, fig 2.3.1.4, fig 2.3.1.5
per fig » per 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 trade population per fig 2.3.1.2 communication costs a developpement en france.*.