Perhaps you should try some spelling variations:
sach thi » sach tai, sach thieu, sach tham
sach thu » sach thue, sach thieu, sach tham
cac thuc » cach thuc, cac thu, can thuc
hanh lai » hanh lam, hanh tai, thanh lap
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
lai cua » dai cua, hai cua, lai chau
ma hoi » mai hoi, xa hoi, ma hoa
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((sach thi) or (sach thu)) nang ma hoi. hieu va cac thuc va hanh lai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach thi) OR (sach thu)) nang ma hoi. hieu va cac thuc va hanh lai cua te.
• Adding a wildcard symbol may retrieve word variants: toc ((sach thi) or (sach thu)) nang ma hoi. hieu va cac thuc va hanh lai cua te*.