Perhaps you should try some spelling variations:
materials communication » material communication, managerial communication, external communication
technological do » technological _, technological know, technological 3.5
do institutions » des institutions, eu institutions, care institutions
4 developing » 3 developing
developing a » developing _
3 materials » 2 materials
a afrique » l afrique, en afrique
africa 3 » africa _, africa a, africa 1
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: technological do institutions africa 3 materials communication costs 4 developing a afrique.*.