Perhaps you should try some spelling variations:
luyen tap » tuyen tap, luyen thi
cach thuc » anh thuc, cac thu
tren mang » tren trang, tran manh, tren may
tap cach » tap cac, phap cach, va cach
tre lang » tre dang, tien lang, tren lanh
ban ke » ban kem, ban le, ban ky
ban ve » ban va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: luyen tap cach thuc đe co ((ban ke) OR (ban ve)) o ((tre lang) OR (tren mang)) cong~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "luyen tap cach thuc đe co ((ban ke) OR (ban ve)) o ((tre lang) or (tren mang)) cong~".
• Adding a wildcard symbol may retrieve word variants: luyen tap cach thuc đe co ((ban ke) OR (ban ve)) o ((tre lang) or (tren mang)) cong*.