Perhaps you should try some spelling variations:
2.2 communication » 2.3 communication, 3.2 communication, 2.7 communication
le developpement » de developpement, sme development
population per » population panel, population p230, population area
technology 4 » technology _, technology 1, technology 3
4 population » 2 population, 2.1 population, 2.2 population
des afrique » en afrique, de l'afrique
costs le » costs _, costs 4, costs a
per fig » per firm
fig 2.2 » fig 5.2, fig 2.1, fig 2.4

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

• Adding a wildcard symbol may retrieve word variants: technology 4 population per fig 2.2 communication costs le developpement des afrique.*.