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