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
developpement de » developpement des, developpement durable
a developpement » au developpement, de developpement, le developpement
prices 6.2.4.1 » prices 2.2.5.7, prices 2.3.1
inflation und » inflation index, inflation _, inflation tax
und prices » fund prices, land prices, bond prices
de afrique » de l'afrique, en afrique, l afrique
costs a » costs _, costs 4

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

• Adding a wildcard symbol may retrieve word variants: technology _ inflation und prices 6.2.4.1 communication costs a developpement de afrique.*.