Perhaps you should try some spelling variations:
2scale communication » scale communication, scales communication, space communication
development state » development stage, developmental state, redevelopment state
communication 3 » communication _, communication a
technology 3.1 » technology 1, technology 2.2, technology _
state africa » trade africa
gap from » gaps from, map from, gdp from
3 gas » _ gas, 2 gas

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

• Adding a wildcard symbol may retrieve word variants: technology 3.1 information gap from 2scale communication 3 gas development state africa.*.