Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
normative content » normative context, information content, normative consensus
economies africa » economics africa, economies after, economies from
based normative » based formative, based narrative, das normative
content do » context do, consent do, content does
do data » eo data, go data, geo data

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

• Adding a wildcard symbol may retrieve word variants: technology based normative content do data communications costs _ emerging economies africa.*.