Perhaps you should try some spelling variations:
26.3 communication » 2.3 communication, 2.2.3 communication, 2.8.3 communication
developpement de » developpement des, developpement durable
a developpement » au developpement, de developpement, le developpement
technology 2 » technology _, technology 1, technology 3
2 inflation » 12 inflation, _ inflation, 6 inflation
prices 26.3 » prices 2.3, prices 2.4, prices 2.1
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 inflation _ prices 26.3 communication costs a developpement de l'afrique.*.