Perhaps you should try some spelling variations:
2.39 communication » 2.3 communication, 2.7 communication, 1.3 communication
technology texas » technology thesis, technology trends, technology tieups
texas population » ties population, vas population, cells populations
population panel » population age, population based, population area
development la » development law, development li, development land
4 development » 2 development, 4 developing
panel fig » panel firm, panel i, panel ii
fig 2.39 » fig 2.3, fig 2.30, fig 2.35
costs 4 » costs _, costs a, costs 4.2
fabrique. » afrique., fabrice.

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

• Adding a wildcard symbol may retrieve word variants: technology texas population panel fig 2.39 communication costs 4 development la fabrique.*.