Perhaps you should try some spelling variations:
quyen tap » tuyen tap, luyen tap, quyen cap
cach thoi » cac thoi, cach noi
cach thuc » anh thuc, cac thu
cong cong » cong dong, trong cong, dung cong
cac chu » cac thu, cac che, cac khu
te cong » tai cong, thi cong, thu cong
ban ve » ban va
ve y » ve ky, ve _, ke 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 ((((cac chu) or (((cach thoi) OR (cach thuc))))) or (cac he)) đe co ban ve y te cong cong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: quyen tap ((((cac chu) OR (((cach thoi) OR (cach thuc))))) OR (cac he)) đe co ban ve y te cong cong.
• The words AND, OR and NOT may confuse the search; try adding quotes: "quyen tap ((((cac chu) or (((cach thoi) OR (cach thuc))))) or (cac he)) đe co ban ve y te cong cong".
• Adding a wildcard symbol may retrieve word variants: quyen tap ((((cac chu) or (((cach thoi) OR (cach thuc))))) or (cac he)) đe co ban ve y te cong cong*.