Perhaps you should try some spelling variations:
chat thuc » thuat thuc, nhan thuc, chat thai
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
danh dai » danh dau, danh di, danh sai
hieu cao » chieu cao, hieu cac, hieu ca
va danh » va dinh, va dan, va hanh
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa

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