Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
hanh lai » hanh lam, hanh tai, thanh lap
dan hanh » dang hanh, dan khanh, dan thanh
thuc dan » thuc hanh, hoc dan, thuc vat
trinh ly » trinh ky, trinh do, trinh tu
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
may hoi » may thoi, tay hoi, mai hoi
tinh ly » sinh ly, dinh ly, tich ly
minh ly » sinh ly, dinh ly, minh ky
lai cua » dai cua, hai cua, lai chau

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

• Performing a fuzzy search may retrieve terms with similar spellings: so ((((tinh ly) OR (minh ly))) or (trinh ly)) mang may hoi. hieu ve cham thuc dan hanh lai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((((tinh ly) OR (minh ly))) OR (trinh ly)) mang may hoi. hieu ve cham thuc dan hanh lai cua vat*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((((tinh ly) OR (minh ly))) or (trinh ly)) mang may hoi. hieu ve cham thuc dan hanh lai cua vat*".