Combining Sort and Where

I'm trying to do something like:

{{ 
collection:translations 
sort="first_published:asc" 
where="century_published:pre-twentieth" 
}}

The sort works fine, but the where don't seem to work as expected, it's a predefined Select fieldtype.

PS I was unsure to use the | or && to have multiple condition in one statement, with or without it still don't work as expected...

What am I doing wrong?