Perhaps you should try some spelling variations:
developpement durable » developpement de
2.3 communication » 3.2 communication, de communication, 4 communication
a developpement » au developpement, de developpement, le developpement
technology 9.7 » technology 1.7, technology 6.7, technology 9.1
inflation coal » inflation can, inflation co, inflation tax
9.7 inflation » 10.7 inflation, 2.3 inflation, 3.2 inflation
coal price » coal prices, oil price
price 2.3 » price 3, price 4.4
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 9.7 inflation coal price 2.3 communication costs a developpement durable afrique.*.