Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
transfer infection » transfer innovation, transfer function, transfer reduction
a communications » a communication, data communications, a communicative
infection ratio » infection rates, infection rate, infection data
development l » development li, development 1, development law
ratio price » option price
l afrique » en afrique
price a » price _, price 3, price cap
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 ratio price a communications costs a development l afrique.*.