You can add the title search into Tamil's query in a couple of
ways:

1. Title specifically matches something:

SELECT *
FROM search_groups
WHERE category_id IN ( 51, 135, 136 )
AND resource_title = '????';


2. Title contains some string:

Begins with it:

SELECT *
FROM search_groups
WHERE category_id IN ( 51, 135, 136 )
AND resource_title LIKE '%';


Contains it:

SELECT *
FROM search_groups
WHERE category_id IN ( 51, 135, 136 )
AND resource_title LIKE '%%';

Ends with it:

SELECT *
FROM search_groups
WHERE category_id IN ( 51, 135, 136 )
AND resource_title LIKE '%';

You could also use the INSTR function or depending on your version you can use Oracle Text (check out CTXCAT in version 9 and up). You may also have to deal with multiple keywords on your search.