Perhaps you should try some spelling variations:
communication costly » communication costs, communication costa, communications costs
5.2 communication » 3.2 communication, 6.2 communication, 2.2 communication
trade development » software development
inflation rates » inflation rate
technology die » technologie die, technology does, technology 4ir
development li » development lid, development lie, development lin
die inflation » does inflation, der inflation, price inflation
costly trade » costs trade, country trade, costly than
rates case » rates cape, states case, rates east
li afrique » l afrique, en afrique
case 5.2 » case 4.2, case 3.2, case 2

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

• Adding a wildcard symbol may retrieve word variants: technology die inflation rates case 5.2 communication costly trade development li afrique.*.