The WORD_SCORE tuning parameter

You can also limit the number of pattern matches with the WORD_SCORE tuning parameter. Word score determines whether words are considered hits.

Assigning a high value to WORD_SCORE results in fewer hits; assigning a low value to WORD_SCORE results in more, less exact matches. You can specify a high word score standard to limit the number of words that are considered matches, as shown in an earlier example and repeated here: 
SELECT id, description FROM videos
    WHERE etx_contains ( description,
    Row('multimedia document editor' , 
        'PATTERN_TRANS & PATTERN_SUBS & WORD_SCORE = 85'));

For a multiword clue, however, you have no way of knowing what the word score is for any one of the clues, so you might get unexpected results.