Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
vat hanh » vat thanh, van hanh, va hanh
vu sach » vu bach, su sach, vu khach
vang ma » tang ma, nang ma, sang ma
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
y vang » ly vang
ma hoi » mai hoi, xa hoi, ma hoa
di cua » dai cua, doi cua, do cua
de cua » le cua, te cua, dieu cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach y vang ma hoi. hieu ve cham thuc vat hanh ((di cua) or (de cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y vang ma hoi. hieu ve cham thuc vat hanh ((di cua) OR (de cua)) te*.