Perhaps you should try some spelling variations:
mass transfer » cash transfer, basin transfer, mass transport
transform sft » transform fft, transform std, transform slant
areas co » areas coal, areas act, areas can
guias de » guia de, guide de, aguas de
de mass » de masse, de mais, de masa
sft a » set a, sft 3
lamperti » lampert, lamberti, lampietti

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 co lamperti transform sft a ) OR ( guias de mass transfer _ a ))~.
• Adding a wildcard symbol may retrieve word variants: (( areas co lamperti transform sft a ) or ( guias de mass transfer _ a ))*.