SELECT *, ((`title` like '%我们%' and `title` like '%他们%') * 0.8 + (`title` like '%我们%' or `title` like '%他们%') * 0.2) AS relevance
FROM text
WHERE (`title` like '%我们%' and `title` like '%他们%') or (`title` like '%我们%' or `title` like '%他们%') 
ORDER BY relevance DESC
limit 6

------解决方案--------------------
SQL code
SELECT * FROM 
(
         SELECT * FROM `text` where `title` like '%我们%' and `title` like '%他们%'
) tt
WHERE  `title` like '%我们%' or `title` like '%他们%' limit 6;

------解决方案--------------------
SQL code
SELECT *, 1 as xh FROM text where (`title` like '%我们%' and `title` like '%他们%')
union
SELECT *, 2 as xh FROM text where (`title` like '%我们%' or `title` like '%他们%')
order by xh
limit 6