Perhaps you should try some spelling variations:
6.2 communication » 3.2 communication, 2.3 communication, 2.7 communication
technology rate » technology state, technology role, technology related
development lie » development life, development li, development lid
rate inflation » grade inflation, wage inflation, age inflation
inflation tax » inflation rate, inflation _, inflation target
4 development » 2 development, 4 developing
lie afrique » l afrique
rates 6.2 » rates 4.2, rates 3.2, rates 5.2
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technology rate inflation tax rates 6.2 communication costs 4 development lie afrique.*.