Perhaps you should try some spelling variations:
kho tang » cao tang
vat hanh » vat thanh, van hanh, va hanh
bai kho » dai kho, tai khoa, bai choi
tang ma » mang may, tang van
hieu va » lieu va, hieu qua
tu bai » tu ban, tu bat, te bai
ma hoi » mai hoi, xa hoi, ma hoa
vi cua » vai cua
di cua » dai cua, doi cua, de cua
va am » va lam, va cam
thuc » thu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu bai kho tang ma hoi. hieu va am thuc vat hanh ((vi cua) OR (di cua)) triet~.
• Adding a wildcard symbol may retrieve word variants: tu bai kho tang ma hoi. hieu va am thuc vat hanh ((vi cua) or (di cua)) triet*.