[Evolution] Search for exact phrase in body of mail messages

[Andrea Vai <andrea vai unipv it>]

Hi,
  using evo 3.20.5

when I need to find an exact phrase (i.e. I put it in double quotes,
"my search strings") in the search box, evo shows messages containing
all the strings, but does not restrict the results to the exact
phrase. It happens searching for text in message body, but it works as
expected if I search in the subject.

Is it by design, or a (known?) bug, or am I missing something?

Thank you,
Andrea