Perhaps you should try some spelling variations:
2.2 communication » 2.3 communication, 3.2 communication, 2.7 communication
developpement en » developpement et, developpement des, developpement de
technology area » technology arena, technology array, technology age
area population » a population, farm population, la population
a developpement » au developpement, de developpement, le developpement
population per » population panel, population p230, population area
per fig » per firm
fig 2.2 » fig 5.2, fig 2.1, fig 2.4
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 area population per fig 2.2 communication costs a developpement en afrique.*.