Perhaps you should try some spelling variations:
communications costly » communications costs, communication costs, communication costa
3.2 communications » 3.2 communication, 3.1 communications, 4.2 communications
trade development » software development
inflation rates » inflation rate
technology die » technologie die, technology does, technology 4ir
development en » developpement en, development menu, development eco
die inflation » does inflation, der inflation, price inflation
costly trade » costs trade, country trade, costly than
space 3.2 » space 2.1

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 space 3.2 communications costly trade development en afrique.*.