Perhaps you should try some spelling variations:
cong cong » cong dong, trong cong, dung cong
bang vat » bang va, dang vat, cang vat
cac kieu » cach tieu, cac yeu, tac kiem
cac khu » cac khoi
cac thu » cach thuc, cac thoi
co bang » cao bang, con bang, co ban
te cong » tai cong, thi cong, thu cong
vat y » vat ly, vat _
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 kieu))) or (cac thu)) đe co bang vat y te cong cong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tuyen tap ((((cac khu) OR (cac kieu))) OR (cac thu)) đe co bang vat y te cong cong.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tuyen tap ((((cac khu) OR (cac kieu))) or (cac thu)) đe co bang vat y te cong cong".
• Adding a wildcard symbol may retrieve word variants: tuyen tap ((((cac khu) OR (cac kieu))) or (cac thu)) đe co bang vat y te cong cong*.