Perhaps you should try some spelling variations:
2.7 communication » 2.3 communication, 3.2 communication, 2 communication
per developpement » leur developpement, de developpement, le developpement
technology 2.3.1 » technology 6.3.1, technology 2.1.1, technology 2.3.2
developpement en » developpement et, developpement des, developpement de
2.3.1 inflation » 2.2.4 inflation, 2.3 inflation, 3.3.3 inflation
inflation trade » inflation rate, inflation rates, inflation tax
trade rules » trade routes
rules 2.7 » rules 2.2, rules 2.4, rules 5.7
costs per » cost per

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

• Adding a wildcard symbol may retrieve word variants: technology 2.3.1 inflation trade rules 2.7 communication costs per developpement en afrique.*.