Rửa sạch mực bằng xà phòng và nước. Xoa bơ hoặc bơ thực vật lên vết mực. Dùng túi trà đã pha và để nguội xoa lên vết mực.

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
This is probably the easiest and most accessible solution. If the ink is oil-based, as many ballpoint pens are, you may not have much luck, but if the pen uses water-soluble ink, it should wash off right away.  Water-based inks tend to seep through paper and take longer to dry, so they are more likely to smear and get on your skin.  Roller ball pens and some gel pens are usually water soluble. It will be kind of gross and may get messy, but the oils in these products will help dissolve the oil c