Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
hieu van » hieu va, thien van, lieu va
van chat » cao chat
nang ma » tang ma, sang ma, nang cao
sach ky » sac ky, sach y, sach ty
thuc va » thuc dan, thuc day
nang xa » nang x, lang xa, mang xa
danh di » danh du, xanh di, danh dien
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ky ((nang xa) or (nang ma)) hoi. hieu van chat ((thuc va) or (thuc vat)) danh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky ((nang xa) OR (nang ma)) hoi. hieu van chat ((thuc va) OR (thuc vat)) danh di cua tre.
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky ((nang xa) or (nang ma)) hoi. hieu van chat ((thuc va) or (thuc vat)) danh di cua tre*.