Need help to rewrite query for XML

Hello everybody,

I have a little problem to display Japanese characters with Varchar type data
All the characters seem to completely disappeared.
So i tried to use XML as shown in 2nd code below.

$query="SELECT * FROM XMLTABLE(
'db2-fn:xmlcolumn(\"TERM.TERM\")/term'
COLUMNS
    TERM [COLOR=#0000ff]VARCHAR (5000)[/COLOR] PATH 'term' ,
    DEFINITION [COLOR=#0000ff]VARCHAR (5000)[/COLOR] PATH 'definition',
    ) AS T
Where LOWER(term) like '%$keyword%' 
";

$stmt = db2_prepare($conn, $query);
$result = db2_execute($stmt);
while($row = db2_fetch_both($stmt)){
print "\t<tr><td>$row[0]</td><td>$row[1]</td></tr>\n";}

Code (markup):

$query="SELECT * FROM XMLTABLE(
'db2-fn:xmlcolumn(\"TERM.TERM\")/term'
COLUMNS
    TERM [COLOR=#ff0000]XML[/COLOR] PATH 'term' ,
    DEFINITION [COLOR=#ff0000]XML[/COLOR] PATH 'definition',
    ) AS T
Where LOWER(term) like '%$keyword%' 
";
$stmt = db2_prepare($conn, $query);
$result = db2_execute($stmt);
while($row = db2_fetch_both($stmt)){
print "\t<tr><td>$row[0]</td><td>$row[1]</td></tr>\n";

Code (markup):

And I've got this error message.
Error message
Warning: db2_execute(): Statement Execute Failed in .php on line
Warning: db2_fetch_both(): Column information cannot be retrieved in.php on line

There is no problem if I remove the

Where LOWER(term) like '%$term%'

Code (markup):

, and the Japanese characters ca be displayed well.

I guess I have to change the
Where LOWER(term) like '%$term%'
expression to go with XML type.

Any idea how to do that?
Thanks in advance.