Perhaps you should try some spelling variations:
thuc van » thuc vat, thuc dan, thuc hanh
hanh dai » hanh tai, hanh dao, vanh dai
tang ma » mang may, tang van
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
ve am » va am

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach y) or (sac ky)) tang ma hoi. hieu ve am ((thuc van) or (thuc va)) hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach y) OR (sac ky)) tang ma hoi. hieu ve am ((thuc van) OR (thuc va)) hanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: su ((sach y) or (sac ky)) tang ma hoi. hieu ve am ((thuc van) or (thuc va)) hanh dai cua tre*.