Block: Latin Extended Additional

Range U+1E00 - U+1EFF
Official Chart http://www.unicode.org/charts/PDF/U1E00.pdf
Wikipedia Latin Extended Additional is a Unicode block.
The characters in this block are mostly precomposed combinations of Latin letters with one or more general diacritical marks. Ninety of the characters are used in the Vietnamese alphabet.
https://en.wikipedia.org/wiki/Latin_Extended_Additional
Characters
ḿ ṿ ế ỿ