Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
technology price » technology rich, technology voice, technology service
developpement de » developpement des, developpement durable
4 developpement » de developpement, le developpement, et developpement
inflation tax » inflation rate, inflation _, inflation target
tax french » a french, state french, taken french
de afrique » de l'afrique, en afrique, l afrique
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 price inflation tax french _ communications costs 4 developpement de afrique.*.