Perhaps you should try some spelling variations:
signal communication » sign communication, digital communication, visual communication
communication cross » communication costs
development works » development work, development workshop, development network
technology 1 » technology _
works africa » towns africa
cross world » across world, crisis world, cpss world
gap from » gaps from, map from, gdp from

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

• Adding a wildcard symbol may retrieve word variants: technology 1 information gap from signal communication cross world development works africa.*.