I assume you read Ukrainian? The "Svichado" books (the Studite printing house in Univ/Lviv) from Ukraine can be obtained through the Basilian Press in Toronto (you might be able to get them there in Brazil, I don't know) have a good selection of common and festal musical settings for the Divine Liturgy. The "Tserkovnij Naspivi" with the green hard cover by Svichado has the eight resurrectional tones, prokimen and alleluia melodies, samohlasni, bulharski, and proper irmosi for most of the feast days as well as proper parts for the Divine Liturgies of St. John Chrysystom, Basil and the Presanctified Gifts.
Some other melodies like the Paschal Kanon of St. John of Damascus, samopodobny for Molebens, basic music for parastas and panakhida and other miscellania are also included in this book. Not a bad place to start for liturgical musical needs, but all in Ukrainian.
Subdeacon Randolph, a sinner