Perhaps you should try some spelling variations:
developpement durable » developpement de
et developpement » de developpement, le developpement, test development
technology rate » technology state, technology role, technology related
a communication » la communication, data communication, data communications
rate inflation » grade inflation, wage inflation, age inflation
inflation a » inflation _, inflation tax, inflation rate
a prices » a price, 2 prices, gas prices
prices a » prices _
costs et » costs _, costs 4, costs a

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

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