Perhaps you should try some spelling variations:
information content » information contents, information centers, information centre
communication cost » communication costs, communication costa, communications costs
technologies 3.1 » technologies 2.1, technologies 3.2, technologies _
ec communication » de communication, 3 communication, 4 communication
2.2 developing » 3.2 developing, 3.3 developing, 2.2 development
content book » content about, content from, content does
cost 2.2 » costs 2.2, cost 2.4, cost 3.2
book ec » book c, book end

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

• Adding a wildcard symbol may retrieve word variants: technologies 3.1 information content book ec communication cost 2.2 developing _ africa.*.