Perhaps you should try some spelling variations:
2.2.5.4 communication » 12.2.4 communication, 2.2.3 communication, 12.4.4 communication
developpement de » developpement des, developpement durable
a developpement » au developpement, de developpement, le developpement
inflation tax » inflation rate, inflation _, inflation target
price 2.2.5.4 » prices 2.2.5.7
tax price » tax crime, fox price
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 tax price 2.2.5.4 communication costs a developpement de l'afrique.*.