Perhaps you should try some spelling variations:
transport firms » transport fares, transport fuels, transport air
sea transport » road transport, bus transport
cash transfer » cash transfers
areas coal » areas can, areas co
coal sea » coal seam, coal seams, coal use
guias do » guia do, guias de, guia de
firms a » firms _
3 ao » 3 a, 3 co, 3 do
_ co » _ do

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: (( areas coal sea transport firms a ) OR ( guias do cash transfer ((3 ao) OR (_ co)) ))~.
• Adding a wildcard symbol may retrieve word variants: (( areas coal sea transport firms a ) or ( guias do cash transfer ((3 ao) or (_ co)) ))*.