Zhuyin

I/ Khái niệm:
" Zhùyīn fúhào (also bopomofo, used in Taiwan) consists of 37 symbols derived from Chinese characters: 21 initials (consonants) and 16 finals (vowels, diphthongs, triphthongs or vowels + n or ng). Finals can stand alone and some initials can as well." (source: forum.wordreference.com CHINESE)
* Mẹo để nhớ được Zhuyin (chú âm): (daytienghoa.com)

Zhùyīn fúhào & Pinyin
韻				介	聲
ㄦ er	ㄢ an	ㄞ ai	ㄚ a	ㄧ(一) i	ㄗ z	ㄓ zh	ㄐ j	ㄍ g	ㄉ d	ㄅ b
	ㄣ en	ㄟ ei	ㄛ o	ㄨ u	ㄘ c	ㄔ ch	ㄑ q	ㄎ k	ㄊ t	ㄆ p
	ㄤ ang	ㄠ ao	ㄜ e	ㄩ iu	ㄙ s	ㄕ sh	ㄒ x	ㄏ h	ㄋ n	ㄇ m
	ㄥ eng	ㄡ ou	ㄝ eh			ㄖ r			ㄌ l	ㄈ f

Zhuyin vs. Pinyin (for Vietnamese students)
聲
-uh	-uh	-uh		Big smile :)		-i (hơi khó) Curl your tongue back		-ư  (khó nhất đấy) (hissing, như rít lên ý)
1. ㄅ b	5. ㄉ d	9. ㄍ g (cơ)		12. ㄐ j (zi:)		15. ㄓ zh		19. ㄗ z
2. ㄆ p	6. ㄊ t	10. ㄎ k (khơ)		13. ㄑ q (chi:)		16. ㄔ ch (sh-)		20. ㄘ c (sư)
3. ㄇ m	7. ㄋ n	11. ㄏ h		14. ㄒ x (shi:)		17. ㄕ sh (sh-)		21. ㄙ s (sư)
4. ㄈ f	8. ㄌ l					18. ㄖ r (j & r)
介
22. ㄧ i, y, yi
23. ㄨ u, wu
24. ㄩ iu (i đọc mạnh, hơi giống uy), yu, -u, ü
韻
25. ㄚ a			29. ㄞai		33. ㄢ an		37. ㄦ er
26. ㄛ o (ô)			30. ㄟei		34. ㄣ en		Listen here: www.mdnkids.com
27. ㄜ e (ơ)			31. ㄠ ao		35. ㄤ ang
28. ㄝ eh (ê)			32. ㄡ ou		36. ㄥ eng (âng)

II/ Zhuyin (also bopomofo):
ㄅㄆㄇㄇㄈㄉㄊㄋㄌㄌㄍㄎㄏㄐㄑㄒㄓㄔㄕㄖㄗㄘㄙㄚㄛㄜㄝㄞㄟㄠㄡㄢㄣㄤㄥㄦㄧㄨㄩ
㈠㈡㈢㈣㈤㈥㈦㈧㈨㈩

III/ Zhuyin (or bopomofo) & Pinyin:
Group 1__Initials (from 1 to 21):
• The first eleven are pretty easy. Just read them like there's a "uh" after the letter. Buh, puh, muh, fuh.......
1. ㄅ b; /buh/
2. ㄆ p; /puh/
3. ㄇ m; /muh/
4. ㄈ f; /fuh/
5. ㄉ d; /duh/
6. ㄊ t; /tuh/
7. ㄋ n; /nuh/
8. ㄌ l; /luh/
9. ㄍ g; /guh/
10. ㄎ k; /kuh/
11. ㄏ h; /huh/
• These next three are said with a big smile :)
12. ㄐ j; /ji:/ jee
13. ㄑ q; chee
14. ㄒ x; shee
• Curl your tongue back in your mouth for these.
15. ㄓ zh
16. ㄔ ch
17. ㄕ sh
18. ㄖ r ("r" is the hardest to pronounce because it sounds like a mix between a j and an r. Your tongue gets pulled back the farthest for this one.)
• These are like a hissing sound.
19. ㄗ z
20. ㄘ c (~sư)
21. ㄙ s (~xư)
Group 2__Medial (middle) (from 22 to 24):
22. ㄧ(一) i
23. ㄨ u
24. ㄩ iu (~iiư)
Group 3__Medial and final sounds (from 25 to 37):
25. ㄚ a
26. ㄛ o (ô)
27. ㄜ e (ơ)
28. ㄝ eh (ê)
29. ㄞ ai
30. ㄟ ei
31. ㄠ ao
32. ㄡ ou
33. ㄢ an
34. ㄣ en
35. ㄤ ang
36. ㄥ eng (âng)
37. ㄦ er

Reference source: anawefulbigadventure.blogspot.comCopyright: huayublog.knsh.com.tw
How to pronounce each character: http://www.mdnkids.com/BoPoMo/
How to write each character (Stroke order): http://simple.wikipedia.org/wiki/File:Bopomofo.png
Phân loại 37 ký tự Zhuyin: http://zh.wikipedia.org/wiki/%E3%84%A7