Perhaps you should try some spelling variations:
luyen tap » tuyen tap, luyen thi
cong cong » cong dong, trong cong, dung cong
tac kiem » thi kiem, va kiem, van kiem
cac khu » cac thu, cac khoi, cac kieu
te cong » tai cong, thi cong, thu cong
ca chu » cua chu, ca chua, cac chu
ban ve » ban va
ve ky » va ky, ke ky
ky te » y te, ky le, ly te

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 khu) or (ca chu))) or (((tac kiem) OR (tac ke)))) đe co ban ve ky te cong cong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: luyen tap ((((cac khu) OR (ca chu))) OR (((tac kiem) OR (tac ke)))) đe co ban ve ky te cong cong*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "luyen tap ((((cac khu) or (ca chu))) or (((tac kiem) OR (tac ke)))) đe co ban ve ky te cong cong*".