Laravel 中的原始相关性查询。怎么处理呢？

我目前正在将一个大项目转移到 Laravel 框架http://hobbyathletes.com/events/south-america/all-event-types/all/。我需要迁移我的内部搜索引擎，它使用以下查询（如果搜索一个单词，此处附加预选选项 South America ）：

SELECT *, (
 (CASE WHEN name LIKE '%searchthis%' THEN 1000 ELSE 0 END) + 
 (CASE WHEN name LIKE 'searchthis %' THEN 10 ELSE 0 END) + 
 (CASE WHEN name LIKE 'searchthis%' THEN 1 ELSE 0 END) + 
 (CASE WHEN name LIKE '% searchthis %' THEN 5 ELSE 0 END) + 
 (CASE WHEN city LIKE '%searchthis%' THEN 500 ELSE 0 END) + 
 (CASE WHEN city LIKE 'searchthis%' THEN 10 ELSE 0 END) + 
 (CASE WHEN city LIKE 'searchthis %' THEN 1 ELSE 0 END) + 
 (CASE WHEN city LIKE '% searchthis %' THEN 5 ELSE 0 END) + 
 (CASE WHEN country LIKE '%searchthis%' THEN 500 ELSE 0 END) + 
 (CASE WHEN country LIKE 'searchthis%' THEN 10 ELSE 0 END) + 
 (CASE WHEN country LIKE 'searchthis %' THEN 1 ELSE 0 END) + 
 (CASE WHEN country LIKE '% searchthis %' THEN 5 ELSE 0 END) + 
 (CASE WHEN homepage LIKE '%searchthis%' THEN 600 ELSE 0 END) + 
 (CASE WHEN headline LIKE '%searchthis%' THEN 100 ELSE 0 END) + 
 (CASE WHEN headline LIKE 'searchthis%' THEN 10 ELSE 0 END) + 
 (CASE WHEN headline LIKE 'searchthis %' THEN 1 ELSE 0 END) + 
 (CASE WHEN headline LIKE '% searchthis %' THEN 5 ELSE 0 END) + 
 (CASE WHEN description LIKE '%searchthis%' THEN 100 ELSE 0 END) + 
 (CASE WHEN description LIKE 'searchthis%' THEN 10 ELSE 0 END) + 
 (CASE WHEN description LIKE 'searchthis %' THEN 1 ELSE 0 END) + 
 (CASE WHEN description LIKE '% searchthis %' THEN 5 ELSE 0 END) + 
 (CASE WHEN distances LIKE '%searchthis%' THEN 100 ELSE 0 END) + 
 (CASE WHEN distances LIKE 'searchthis%' THEN 10 ELSE 0 END) + 
 (CASE WHEN distances LIKE 'searchthis %' THEN 1 ELSE 0 END) + 
 (CASE WHEN distances LIKE '% searchthis %' THEN 5 ELSE 0 END) + 
 (CASE WHEN date LIKE '%2014%' THEN 300 ELSE 0 END) + 
 (CASE WHEN name LIKE '%2014%' THEN 200 ELSE 0 END) + 
 (CASE WHEN date LIKE '%2013%' THEN 200 ELSE 0 END) + 
 (CASE WHEN name LIKE '%2013%' THEN 100 ELSE 0 END) 
) 
 AS relevance 
 FROM events 
 WHERE 
 (
 country = 'Argentina' or 
 country = 'Bolivia' or 
 country = 'Brazil' or 
 country = 'Chile' or 
 country = 'Colombia' or 
 country = 'Ecuador' or 
 country = 'Guyana' or 
 country = 'Paraguay' or 
 country = 'Peru' or 
 country = 'Suriname' or 
 country = 'Uganda' or 
 country = 'Uruguay' or 
 country = 'Venezuela'
 ) 
 AND
 ( 
 name LIKE '%searchthis%' OR 
 country LIKE '%searchthis%' OR 
 city LIKE '%searchthis%' OR 
 homepage LIKE '%searchthis%' OR 
 headline LIKE '%searchthis%' OR 
 description LIKE '%searchthis%' OR 
 distances LIKE '%searchthis%'
) 
ORDER BY relevance DESC

如何将此查询传输到 Eloquent 查询构建器？我已经尝试过了DB:raw($query)这似乎不起作用...尝试过急需的->paginate(25)与->get()，全部不起作用。这里有人可以引导我走向正确的方向吗？

尝试使用 DB::select()

DB::select(DB::raw("
    SELECT * FROM bla bla bla  
"));