Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
sach kem » hanh kem
vat hanh » vat thanh, van hanh, va hanh
hanh tai » thanh tai, hang tai, han tai
sach ky » sac ky, sach ty, sach hay
cao hoi » cau hoi, co hoi, cao hoc
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet

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

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