I bought these stickers at a reuse store and I'm not sure what it says, and if the words seem fitting, I was going to but it on my binder I will use for my Mandarin classes.
萬事如意 /wan4 shi4 ru2 yi4/ (May everything be as you wish)
This is one of those auspicious sayings people use around Chinese New Year. People often say this to one another, and/or write the four characters on red paper to use as wall decoration around Chinese New Year.
You can certainly use them to decorate your binder. Happy learning!