Perhaps you should try some spelling variations:
des developpement » des developpements, de developpement, le developpement
3.1 communication » 3.1 communications, 3.2 communication, 3.5 communication
developpement en » developpement et, developpement des, developpement de
technology 3.2 » technology 2.2, technology 3.1, technology 2
3.2 inflation » 12 inflation, 2.3 inflation, 3.2 isolation
index prices » index price, index places, index provinces
prices 3.1 » prices 2.1, prices 3.2, prices 2.3.1
costs des » costs fees

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

• Adding a wildcard symbol may retrieve word variants: technology 3.2 inflation index prices 3.1 communication costs des developpement en afrique.*.