Perhaps you should try some spelling variations:
cong cong » cong dong, trong cong, dung cong
bang vat » bang va, dang vat, cang vat
thi cong » tai cong, thien cong
cac khu » cac khoi, cac kieu
cac thu » cach thuc, cac thoi
co bang » cao bang, con bang, co ban
vat y » vat ly, vat _
y thi » ky thi, y thai, ly 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 khu) or (cac thu)) đe co bang vat y thi cong cong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tuyen tap ((cac khu) OR (cac thu)) đe co bang vat y thi cong cong.
• Adding a wildcard symbol may retrieve word variants: tuyen tap ((cac khu) or (cac thu)) đe co bang vat y thi cong cong*.