Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
national development » international development, institutional development, social development
technology 2.6 » technology 20.6, technology 24.6, technology 2.2
infection rate » infection rates, inflation rate
costs national » cross national, across national, gross national
2.6 infection » 2.2.1 infection, 2.2.5 infection, 14.9 infection
development l » development li, development 1, development law
l afrique » en afrique
rate car » rate cap, rate can, rate cfr
car data » care data, war data, sar data

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

• Adding a wildcard symbol may retrieve word variants: technology 2.6 infection rate car data communications costs national development l afrique.*.