Perhaps you should try some spelling variations:
quyen tap » tuyen tap, luyen tap, quyen cap
cac chien » cuoc chien, van chien, nam chien
cong cong » cong dong, trong cong, dung cong
cac thu » cach thuc, cac thoi
ban vat » bang vat, ben vat, van vat
ly thi » ly thoi, le thi, ly tai
y thi » ky thi, y thai, _ thi

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