Perhaps you should try some spelling variations:
transform tvdft » transform fft, transform test
make transform » make transport, can transform, we transform
areas coal » areas can, areas co
transfer 3 » transfer _, transfer 4, transfer a
coal make » coals make, coal smoke, coal mine
_ gases » _ games, _ gates, _ ganges
3 ao » 3 a, 3 co, 3 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 make transform tvdft a ) OR ( guias ((f gases) OR (_ gases)) transfer 3 ao ))~.
• Adding a wildcard symbol may retrieve word variants: (( areas coal make transform tvdft a ) or ( guias ((f gases) or (_ gases)) transfer 3 ao ))*.