Perhaps you should try some spelling variations:
data communication » data communications
interaction about » interaction among, introduction about, interaction counts
developing high » develop high, developing city, developing ict
technologies 4 » technologies _
4 interaction » 4 interactions, 2 interaction, 3 interaction
4 developing » 3 developing
about main » about making, about brain, about email
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technologies 4 interaction about main data communication costs 4 developing high afrique.*.