Perhaps you should try some spelling variations:
quyen tap » tuyen tap, luyen tap, quyen cap
cach thuc » anh thuc, cac thu
cong cong » cong dong, trong cong, dung cong
tap cach » tap cac, phap cach, va cach
con bang » cong bang, von bang, can bang
co bang » cao bang, co ban, co bana
va y » va ky, va my, vat y

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 đe ((co bang) OR (con bang)) va y thai ((cong cong) or (cong (dong or dung)))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: quyen tap cach thuc đe ((co bang) OR (con bang)) va y thai ((cong cong) OR (cong (dong OR dung))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "quyen tap cach thuc đe ((co bang) OR (con bang)) va y thai ((cong cong) or (cong (dong or dung)))".
• Adding a wildcard symbol may retrieve word variants: quyen tap cach thuc đe ((co bang) OR (con bang)) va y thai ((cong cong) or (cong (dong or dung)))*.