Perhaps you should try some spelling variations:
communication costly » communication costs, communication costa, communications costs
inflation targets » inflation target, inflation targeting, inflation rates
4.1 communication » 4 communication, 2.3 communication, 3.2 communication
trade development » software development
technology u.s » technology uses, technology 2.2, technology use
u.s inflation » und inflation, 2.3 inflation, 3.2 inflation
development l » development li, development 1, development law
targets rule » targets whole, target file
costly trade » costs trade, country trade, costly than
l afrique » en afrique
rule 4.1 » rule 14.1, rules 4.1, rule 3.1

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

• Adding a wildcard symbol may retrieve word variants: technology u.s inflation targets rule 4.1 communication costly trade development l afrique.*.