Perhaps you should try some spelling variations:
4.2.1 communication » 4.2.2 communication, 4.2.4 communication, 4.5.1 communication
developpement de » developpement des, developpement durable
a developpement » au developpement, de developpement, le developpement
technology 2.2 » technology _, technology 1, technology 3
2.2 inflation » 2.3 inflation, 3.2 inflation, 2.2.4 inflation
index prices » index price, index places, index provinces
prices 4.2.1 » prices 2.1, prices 2.2.2, prices 2.3.1
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 2.2 inflation index prices 4.2.1 communication costs a developpement de afrique.*.