Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
infection trade » infection rate, infection rates, infection add
development lin » development li, development lid, development lie
4 development » 2 development, 4 developing
technology 3 » technology _, technology 1, technology 4
trade series » trading series, trade secrets
3 infection » _ infection, 3 injection, 4 infection
lin afrique » en afrique, l 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 3 infection trade series data communications costs 4 development lin afrique.*.