Perhaps you should try some spelling variations:
4.2 communication » 4.2 communications, 3.2 communication, 4.1 communication
trade development » software development
development does » development data, development 1, development 1.1
inflation rates » inflation rate
technology die » technologie die, technology does, technology 4ir
die inflation » does inflation, der inflation, price inflation
does afrique » en afrique, does africa
costs trade » costly trade
rates rule » bayes rule, rate rules, rates reduce
rule 4.2 » rules 4.2, rule 2.2, rule 3.2

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 rule 4.2 communication costs trade development does afrique.*.