Perhaps you should try some spelling variations:
cong cong » cong dong, trong cong, dung cong
cac chu » cac thu, cac khu, ca chu
cac che » cac he, cac chien, cac chat
ban ke » ban kem, ban ve, ban ky
ban le » ban ve
ly thi » ly thoi, le thi, ly tai
y thi » ky thi, y thai, _ thi
tuyen » truyen, quyen

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tuyen tap ((cac chu) or (cac che)) đe co ((ban ke) or (ban le)) ((y thi) OR (ly thi)) cong cong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tuyen tap ((cac chu) OR (cac che)) đe co ((ban ke) OR (ban le)) ((y thi) OR (ly thi)) cong cong.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tuyen tap ((cac chu) or (cac che)) đe co ((ban ke) or (ban le)) ((y thi) OR (ly thi)) cong cong".
• Adding a wildcard symbol may retrieve word variants: tuyen tap ((cac chu) or (cac che)) đe co ((ban ke) or (ban le)) ((y thi) OR (ly thi)) cong cong*.