my $str1 = "(View like all data) AND (Path not like /usr/bin)"; # working 

my $str2 = "(View like all data AND Path not like /usr/bin)";
 # not working
while ($str1 =~ /\(\s*[\W\w]+?(like|not like)\s+([^%][\w\W][^%]+?)\s*\)/)
{
    my $new = "%".$2."%";
    $str =~ s/$2/$new/;
}