多个搜索/过滤器

I have this PHP form, everything it's ok but I want to search like in screenshot.

Search after X SKU if EAN is like Y or search after Interne Nr. X if EAN like Y

 select * 
    from **centralhub_logistik**
    where **sku** LIKE '%$search%'
    OR 
    **EAN** LIKE '%$search%'
    OR **InterneNr** LIKE '%$search%
    'LIMIT 0 , 50