Perhaps you should try some spelling variations:
quyen tap » tuyen tap, luyen tap, quyen cap
cach thuc » cac thu
cong cong » cong dong, trong cong, dung cong
anh thuc » am thuc, dan thuc, anh tu
ban vat » bang vat, ben vat, ban va
vat y » vat ly, vat _
y tai » ly tai, y thai, ty tai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: quyen tap ((cach thuc) or (anh thuc)) đe co ban vat y tai cong cong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: quyen tap ((cach thuc) OR (anh thuc)) đe co ban vat y tai cong cong.
• Adding a wildcard symbol may retrieve word variants: quyen tap ((cach thuc) or (anh thuc)) đe co ban vat y tai cong cong*.