Perhaps you should try some spelling variations:
dam thuc » am thuc, dan thuc, nam thuc
hanh dai » hanh tai, hanh dao, vanh dai
cau tren » cu tren, dau tren, ca tren
te sach » toc sach
sach ty » sach y, sach tu, sach thu
xang ma » tang ma, nang ma, sang ma
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
dai cau » dat cau, da cau, dai hau
ma hoi » mai hoi, xa hoi, ma hoa
cam tu » cam thu, nam tu, dam tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty xang ma hoi. hieu ve ((dam thuc) or (cam tu)) va hanh dai cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty xang ma hoi. hieu ve ((dam thuc) OR (cam tu)) va hanh dai cau tren.
• Adding a wildcard symbol may retrieve word variants: te sach ty xang ma hoi. hieu ve ((dam thuc) or (cam tu)) va hanh dai cau tren*.