Perhaps you should try some spelling variations:
quyen tap » tuyen tap, luyen tap, huyen tam
quyen cap » quyen cach, huyen cao, quyen con
thai cong » tai cong, thi cong, thanh cong
cong cong » cong dong, trong cong, dung cong
bang vat » bang va, dang vat, cang vat
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) OR (quyen cap)) cac thu đe co ((ban vat) or (bang vat)) y thai cong cong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((quyen tap) OR (quyen cap)) cac thu đe co ((ban vat) OR (bang vat)) y thai cong cong.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((quyen tap) OR (quyen cap)) cac thu đe co ((ban vat) or (bang vat)) y thai cong cong".
• Adding a wildcard symbol may retrieve word variants: ((quyen tap) OR (quyen cap)) cac thu đe co ((ban vat) or (bang vat)) y thai cong cong*.