Perhaps you should try some spelling variations:
quyen tap » tuyen tap, luyen tap, quyen cap
cac thuat » va thuat, hoc thuat, cac chat
cong cong » cong dong, trong cong, dung cong
cac thu » cach thuc, cac thoi
cac che » cac he, cac chien, cac chat
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 thu) or (((cac che) or (cac thuat)))) đe co ban ve y te cong cong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: quyen tap ((cac thu) OR (((cac che) OR (cac thuat)))) đe co ban ve y te cong cong.
• Adding a wildcard symbol may retrieve word variants: quyen tap ((cac thu) or (((cac che) or (cac thuat)))) đe co ban ve y te cong cong*.