Perhaps you should try some spelling variations:
5.2 communication » 3.2 communication, 6.2 communication, 2.2 communication
le developpement » de developpement, sme development
population per » population panel, population p230, population area
technology la » technology law, technology lag, technology land
la population » a population, 2 population, 4 population
des afrique » en afrique, de l'afrique
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 la population per fig 5.2 communication costs le developpement des afrique.*.