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use 5.010_001;

...
    say @hash{ qw# one two # };
    say @hash{ (qw# one two #) };
}

Scalar value @hash{ qw# one two # } better written as $hash{ qw# one t
+wo # } at mytest.pl line 12.
um    dois
um    dois

Scalar value @hash{ qw# one two # } better written as 
$hash{ qw# one two # } at mytest.pl line 13 (#1)
...
hash element as a list, you need to look into how references 
work, because Perl will not magically convert between scalars 
and lists for you.  See perlref.