Perhaps you should try some spelling variations:
market infrastructure » market infrastructures, market microstructure, market structure
scale infrastructure » scalable infrastructure, secure infrastructure, core infrastructure
space infrastructure » service infrastructure, storage infrastructure, science infrastructure
smart infrastructure » market infrastructures, transport infrastructure

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( ((scale infrastructure) OR (space infrastructure)) policies ) OR ( ((smart infrastructure) OR (market infrastructure)) politics )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((scale infrastructure) or (space infrastructure)) policies ) or ( ((smart infrastructure) OR (market infrastructure)) politics ))".
• Adding a wildcard symbol may retrieve word variants: (( ((scale infrastructure) or (space infrastructure)) policies ) or ( ((smart infrastructure) OR (market infrastructure)) politics ))*.