Perhaps you should try some spelling variations:
2.3.1.1 communication » 2.2.5.4 communication, 3.4.1 communication, 6.2.4.1 communication
communication case » communications case, communication based, communication phase
au developpement » du developpement, de developpement, le developpement
developpement de » developpement des, developpement durable
prices 2.3.1.1 » primer 2.3.1.1, prices 2.2.5.7, prices 2.3.4
technology 1 » technology _
index prices » index price, index places, index provinces
1 inflation » 10 inflation, 12 inflation, _ inflation
de afrique » de l'afrique, en afrique, l afrique
case au » case a, case all

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

• Adding a wildcard symbol may retrieve word variants: technology 1 inflation index prices 2.3.1.1 communication case au developpement de afrique.*.