Choral Public Domain Library

As grouping does not seem to be supported, I have searched by languages seprately, but unforutnately I obtain inconsistent search results depending on the search method.

The Magnificat page https://www.cpdl.org/wiki/index.php/Magnificat lists 191 settings in English, but a search for
yields only 49 results, and a "Multi Category Search" for works in English and "part of work title" Magnificat lists 176 results. I understand that the last search should yield fewer matches because it misses work titles like "My soul doth magnify the Lord", but I do not understand why the search for "linktext:Magnificat" yields way too few matches.

Is this the wrong way to search for works that link to the text of the Magnificat?

I guess that many Magnificats are mentioned inside LinkText template another way, particularly when they are found with Nunc dimittis: {{LinkText|2|Magnificat|Nunc dimittis}}. Also, many Magnificats are part of Vespers, etc.

Is there a way to cover all of these cases in a query? In other words: How can I find all work pages where the tag "LinkText" matches the following regular expession?
Here "\|" stands for a literal vertical stroke, as it is used as a separator in the CPDL Wiki tags, and not for the OR sympbol of regular expressions.