Perhaps you should try some spelling variations:
luyen tap » tuyen tap, luyen thi
cong cong » cong dong, trong cong, dung cong
cac chu » cac che, ca chu, cac cau
cac khu » cac khoi, cac kieu
cac thu » cach thuc, cac thoi
ban ve » ban va
ty tai » ly tai, tu tai, te tai
y tai » ly tai, y thai, _ tai

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

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