Perhaps you should try some spelling variations:
2.14 communication » 2.4 communication, 5.4 communication, 2.3 communication
4.2 developpement » 4.2 development, de developpement, le developpement
technology tools » technology thesis
tools population » ties population, does population, ios population
population per » population panel, population p230, population area
des afrique » en afrique, de l'afrique
fig 2.14 » fig 2.1, fig 2.4, fig 2.15
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 tools population per fig 2.14 communication costs 4.2 developpement des afrique.*.