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 du » developpement de, developpement des, developpement et
4 developpement » de developpement, le developpement, et developpement
prices 2.2.5.7 » prices 2.2.2, prices 2.3.5
inflation und » inflation index, inflation _, inflation tax
technology 1 » technology _
1 inflation » 10 inflation, 12 inflation, _ inflation
und prices » fund prices, land prices, bond prices
du afrique » en afrique, l afrique, de l'afrique
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 1 inflation und prices 2.2.5.7 communication costs 4 developpement du afrique.*.