Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
do communications » 10 communications, 14 communications, 2 communications
technologies 4 » technologies _
4 integration » 3 integration, 2 integration, 4.1 integration
costs human » sts human, ghosts humans, beasts human
lessons i » lessons _, lessons 1, lessons a
does do » does de, does d, does fdi
3 does » 13 does, 2 does, 4 does

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

• Adding a wildcard symbol may retrieve word variants: technologies 4 integration 3 does do communications costs human development lessons i.*.