Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
technology role » technology's role, technology risk, technology r
4 developpement » de developpement, le developpement, et 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 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 role infection data practices _ communications costs 4 developpement l afrique.*.