Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
developpement de » developpement des, developpement durable
technology 21st » technology 2.1.1, technology 2.1.2, technology 2.1.3
inflation rates » inflation rate
4 developpement » de developpement, le developpement, et developpement
21st inflation » 10 inflation, 12 inflation, 2 inflation
de afrique » de l'afrique, en afrique, l afrique
rates 6.4 » states 6.4, rates 4.2, rates 4.5
6.4 data » 3.4 data, 2.4 data, 5.4 data
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 21st inflation rates 6.4 data communications costs 4 developpement de afrique.*.