The Sanctus typically follows the standard Latin text: "Sanctus, Sanctus, Sanctus Dominus Deus Sabaoth..." .
It is entirely possible that the exact phrase "Sanctus Missa Laetare" returns zero results on major sheet music sites. Do not despair. Music librarians often mislabel files. Try these alternative keywords: Sanctus Missa Laetare Partition Pdf
This is the core of your search. Because the keyword includes "PDF," we assume you want a free or paid digital download. Here are the most reliable sources for liturgical scores. The Sanctus typically follows the standard Latin text: