Perhaps you should try some spelling variations:
2.2.5.7 communication » 2.2.5.4 communication, 2.2.3 communication, 2.3.1.1 communication
developpement en » developpement et, developpement des, developpement de
4 developpement » de developpement, le developpement, et developpement
technology 3.3 » technology 3.1, technology 3.2, technology 2.3
prices 2.2.5.7 » prices 2.2.2, prices 2.3.5
3.3 inflation » 2.3 inflation, 3.2 inflation, 3.3.3 inflation
inflation und » inflation index, inflation _, inflation tax
und prices » fund prices, land prices, bond prices
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technology 3.3 inflation und prices 2.2.5.7 communication costs 4 developpement en afrique.*.