Perhaps you should try some spelling variations:
2.2.5.4 communication » 12.2.4 communication, 2.2.3 communication, 12.4.4 communication
population panel » population age, population based, population area
de developpement » sme development
developpement la » developpement de, developpement et, developpement du
technology trap » technology trade, technology tax, technology than
trap population » rural population, rapid population, boar population
fig 2.2.5.4 » cip 2.2.5.4, fig 2.3.1.4
panel fig » panel firm, panel i, panel ii
costs de » costs _, costs 4, costs a
la farce » la force, la face, la france

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

• Adding a wildcard symbol may retrieve word variants: technology trap population panel fig 2.2.5.4 communication costs de developpement la farce.*.