No, this is really impossible.
This transformation, using one of De Morgan 's laws , is a little shorter, but there are only a few differences between the characters:
SELECT *
FROM table1
WHERE NOT (field1 LIKE '%test%' OR
field2 LIKE '%test%' OR
field3 LIKE '%test%')
, , , , , '%test%' , , '%te_st%':
SELECT *
FROM table1
WHERE (field1 + '_' + field2 + '_' + field3) NOT LIKE '%test%'
, , , - .