Perhaps you should try some spelling variations:
personal communication » interpersonal communication
institutions design » institutional design
technological do » technological _, technological know, technological 3.5
do institutions » des institutions, eu institutions, care institutions
4 developing » 3 developing
developing a » developing _
5 personal » a personal, 1 personal, 4 personal
a afrique » l afrique, en afrique
design 5 » design 4, design 3
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 design 5 personal communication costs 4 developing a afrique.*.