Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
technology role » technology's role, technology risk, technology r
a developpement » au developpement, de developpement, le developpement
developpement l » developpement il, developpement la, developpement de
role infection » site infection, co infection, une infection
infection data » infection rate, infection rates, section data
data practices » farm practices
l afrique » en afrique
costs a » costs _, costs 4

You may be able to get more results by adjusting your search query.

• Adding a wildcard symbol may retrieve word variants: technology role infection data practices _ communications costs a developpement l afrique.*.