Perhaps you should try some spelling variations:
2.3.1.4 communication » 2.3.1.1 communication, 2.2.5.4 communication, 2.14 communication
technology trade » technology trends, technology transfer, technology transfers
trade population » create population, france population, age population
le developpement » de developpement, sme development
developpement la » developpement de, developpement et, developpement du
population per » population panel, population p230, population area
fig 2.3.1.4 » fig 2.3.1.2, fig 2.3.1.3, fig 2.3.1.5
la fabrice » la fabrique, la matrice, la farce
costs le » costs _, costs 4, costs a
per fig » per firm

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 2.3.1.4 communication costs le developpement la fabrice.*.