Perhaps you should try some spelling variations:
cong cong » cong dong, trong cong, dung cong
quyen tap » tuyen tap, luyen tap, quyen cap
cac thoi » cac toi, cac hop, cac tro
van hieu » cao hieu
cac thu » cach thuc
ban vat » bang vat, ben vat, van vat
te cong » tai cong, thi cong, thu cong

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 thoi))) or (van hieu)) đe co ((ban vat) or (ban va)) y te cong cong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: quyen tap ((((cac thu) OR (cac thoi))) OR (van hieu)) đe co ((ban vat) OR (ban va)) y te cong cong.
• Adding a wildcard symbol may retrieve word variants: quyen tap ((((cac thu) or (cac thoi))) or (van hieu)) đe co ((ban vat) or (ban va)) y te cong cong*.