Perhaps you should try some spelling variations:
layered transform » lamperti transform, wavelet transform, leaders transform
gas transport » mass transport, bus transport, car transport
two layered » two layer
transport a » transport _, transport data
areas two » areas co
guias de » guia de, guide de, aguas de
de gas » de gaos, die gas, de gaz
std a » atd a, ltd a, sad a
ahd a » add a, aid a, atd a

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 two layered transform ((std a) OR (ahd a)) ) OR ( guias de gas transport a la ))~.
• Adding a wildcard symbol may retrieve word variants: (( areas two layered transform ((std a) or (ahd a)) ) or ( guias de gas transport a la ))*.