Perhaps you should try some spelling variations:
population measures » population pressures, pollution measures, population pressure
de communication » mobile communication, online communication
technology set » technology sector, technology 1, technology 2.2
set population » meet population, de population, em population
4.3 developing » 3.3 developing, 1.3 developing, 7.3 developing
costs 4.3 » costs 4.2, costs 4.4, costs 2.3
annex de » annex der, annex d, annex 1e

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

• Adding a wildcard symbol may retrieve word variants: technology set population measures annex de communication costs 4.3 developing _ african.*.