Perhaps you should try some spelling variations:
thai cong » tai cong, thi cong, thanh cong
quyen tap » tuyen tap, luyen tap, quyen cap
cong cong » cong dong, trong cong, dung cong
bang vat » bang va, cang vat, hang va
dang vat » dang van, dong vat, dang nhat
tap cac » tai cac, tap trac
cac thu » cach thuc, cac thoi
ban vat » ben vat, ban va, van vat

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 đe co ((ban vat) or (((bang vat) OR (dang vat)))) y thai cong cong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: quyen tap cac thu đe co ((ban vat) OR (((bang vat) OR (dang vat)))) y thai cong cong.
• The words AND, OR and NOT may confuse the search; try adding quotes: "quyen tap cac thu đe co ((ban vat) or (((bang vat) OR (dang vat)))) y thai cong cong".
• Adding a wildcard symbol may retrieve word variants: quyen tap cac thu đe co ((ban vat) or (((bang vat) OR (dang vat)))) y thai cong cong*.