Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
transfer infection » transfer innovation, transfer function, transfer reduction
infection data » infection rate, infection rates, section data
development l » development li, development 1, development law
data price » data primer, data pre, data rich
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 transfer infection data price _ communications costs a development l afrique.*.