Perhaps you should try some spelling variations:
secure communication » remote communication, science communication, mobile communication
technologies based » technologies used, technology based, technologies a
normative content » normative context, information content, normative consensus
based normative » based formative, based narrative, das normative
3.5 developing » 3.3 developing, 3.2 developing, 1.5 developing
developing em » developing e, developing eq, developing amp
content a » content _, content 1, content 3
costs 3.5 » costs 4.2, costs 4.4, costs 2.3
em africa » 1 africa
a secure » _ secure

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

• Adding a wildcard symbol may retrieve word variants: technologies based normative content a secure communication costs 3.5 developing em africa.*.