WITHIN clause is used to narrow results down
SELECT css('#title') as title
WITHIN css(".content-container")
FROM http://www.delven.io/test/index-01.html
SELECT css('#title') as title
WITHIN [css(".content-container-a"), css(".content-container-b")]
FROM http://www.delven.io/test/index-01.html
SELECT css('#title') as title
WITHIN [css(".content-container-a"), css(".content-container-b")]
FROM http://www.delven.io/test/index-01.html
WHERE
css(".content-container-a .title") LIKE ('Test 1', 'Test 2')
OR
css(".content-container-b .title") LIKE ('Test 3', 'Test 4')