Perhaps you should try some spelling variations:
voice communications » mobile communications, guinea communications, online communications
communications costs » communication costs, communications _
developed content » developed contexts, developed control, development contents
content assessed » contexts assessed, contents assessing, context assessing
information 1.7 » information 12.7, information 1.2, information 1.3
technologies 4 » technologies _
4 information » 2 information, 1 information
6.4 developed » 6.1 developed, 9.4 developed, 15.4 developed
costs 6.4 » costs 4.4, costs 4.2, costs 2.3

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

• Adding a wildcard symbol may retrieve word variants: technologies 4 information 1.7 _ voice communications costs 6.4 developed content assessed.*.