Perhaps you should try some spelling variations:
hieu cao » chieu cao, hieu cac, hieu ca
hanh dai » hanh tai, hanh dao, vanh dai
nang ma » tang ma, sang ma, nang cao
sach ky » sac ky, sach y, sach kem
sach ty » sach y, sach tu, sach thu
thuc va » thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach ky) or (sach ty)) nang ma hoi. hieu cao chat ((thuc va) OR (thuc vat)) hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sach ty)) nang ma hoi. hieu cao chat ((thuc va) OR (thuc vat)) hanh dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ky) or (sach ty)) nang ma hoi. hieu cao chat ((thuc va) OR (thuc vat)) hanh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: thu ((sach ky) or (sach ty)) nang ma hoi. hieu cao chat ((thuc va) OR (thuc vat)) hanh dai cua tre*.