Perhaps you should try some spelling variations:
luyen tap » tuyen tap, luyen thi
cach thuc » cac thu
cong cong » cong dong, trong cong, dung cong
anh thuc » am thuc, dan thuc, anh tu
bang vat » bang va, dang vat, cang vat
co bang » cao bang, con bang, co ban
vat y » vat ly, vat _
y thu » ly thu, ky thu, y thuc

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) OR (anh thuc)) đe co bang vat y thu cong cong~.
• Adding a wildcard symbol may retrieve word variants: luyen tap ((cach thuc) or (anh thuc)) đe co bang vat y thu cong cong*.