Perhaps you should try some spelling variations:
developpement durable » developpement de
2.5 communication » 2.3 communication, 2.7 communication, 3.5 communication
technology 1 » technology _
1 inflation » 10 inflation, 12 inflation, _ inflation
inflation 1 » inflation _, inflation a, inflation tax
prices 2.5 » prices 2.4, prices 2.1, prices 2.3
1 prices » 1 price, 2 prices, do prices

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

• Adding a wildcard symbol may retrieve word variants: technology 1 inflation 1 prices 2.5 communication costs _ developpement durable afrique.*.