Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
sach vuc » sach duoc, sach nuoc, sach truc
sach dao » lanh dao
vat hanh » vat thanh, van hanh, va hanh
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach vuc) or (sach dao)) nang x hoi. hieu ve cham thuc vat hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach vuc) OR (sach dao)) nang x hoi. hieu ve cham thuc vat hanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: su ((sach vuc) or (sach dao)) nang x hoi. hieu ve cham thuc vat hanh di cua tre*.