Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
qua cham » qua hai, qua cac, va cham
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
thuc va » thuc vat, thuc dan, thuc day
dau lai » dao lai, dat lai, dau hai
lai cua » dai cua, hai cua, lai chau
nang o » nang co, nang ho, nang ro
va dau » va dao
cua te » cua tu
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty nang o hoi. hieu qua cham thuc va dau lai cua te~.
• Adding a wildcard symbol may retrieve word variants: te sach ty nang o hoi. hieu qua cham thuc va dau lai cua te*.