Perhaps you should try some spelling variations:
quyen tap » tuyen tap, luyen tap, quyen cap
cong cong » cong dong, trong cong, dung cong
cac chat » cao chat, cac thuat, cac nha
thi cong » tai cong, thien cong
cac khu » cac thu, cac khoi, cac kieu
ban vu » ban va, ban ve, ban tu
vu le » va le

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