Perhaps you should try some spelling variations:
6.2.4.1 communication » 6.2.4.2 communication, 6.2.4.3 communication, 11.4.1 communication
population panel » population age, population based, population area
developpement la » developpement de, developpement et, developpement du
technology than » technology tax, technology trap, technology change
than population » change population, orphan population, urban population
4 developpement » de developpement, le developpement, et developpement
panel fig » panel firm, panel i, panel ii
costs 4 » costs _, costs a, costs 4.2
matrice. » matrices., maurice., patrice.

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

• Adding a wildcard symbol may retrieve word variants: technology than population panel fig 6.2.4.1 communication costs 4 developpement la matrice.*.