Perhaps you should try some spelling variations:
technology leaders » technology readiness, technology trade, technology users
4.2 communication » 4.2 communications, 3.2 communication, 4.1 communication
leaders sector » leaders section, leading sector
developing du » developing _, developing a, developing e
4 developing » 3 developing
sector wage » sector wages
du afrique » en afrique, l afrique, de l'afrique
rates 4.2 » rates 4.5
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 leaders sector wage rates 4.2 communication costs 4 developing du afrique.*.