Perhaps you should try some spelling variations:
cong cong » cong dong, dung cong, dang cong
quyen tap » tuyen tap, luyen tap, quyen cap
cac chu » cac thu, cac khu, ca chu
cac che » cac he, cac chien, cac chat
lay thi » lay thai, ly thi, day thi
ban ke » ban kem, ban ve, ban le
ke lay » ke xay, ke may, ke lam

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 (cac che)) đe co ban ke lay thi ((cong cong) or (trong cong))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: quyen tap ((cac chu) OR (cac che)) đe co ban ke lay thi ((cong cong) OR (trong cong)).
• Adding a wildcard symbol may retrieve word variants: quyen tap ((cac chu) or (cac che)) đe co ban ke lay thi ((cong cong) or (trong cong))*.