Perhaps you should try some spelling variations:
2.1 communication » 2.14 communication, 2.3 communication, 2.7 communication
technology 2.3.1 » technology 6.3.1, technology 2.1.1, technology 2.3.2
developpement en » developpement et, developpement des, developpement de
2.3.1 inflation » 2.2.4 inflation, 2.3 inflation, 3.3.3 inflation
a developpement » au developpement, de developpement, le developpement
inflation der » inflation index, inflation _, inflation tax
der prices » user prices, debt prices, do prices
prices 2.1 » prices 2.4, prices 2.3, prices 3.1
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 2.3.1 inflation der prices 2.1 communication costs a developpement en afrique.*.