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
sang ma » tang ma, nang ma, sang tao
sach ky » sac ky, sach y, sach ty
truc va » thuc va, trung va
nang xa » nang x, lang xa, nang ma
danh le » dinh le, manh le, anh le
cua tre » cua te, cuu tre, cua triet
le cua » ly 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 (sang ma)) hoi. hieu van chat ((truc va) or (thuc vat)) danh le cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky ((nang xa) OR (sang ma)) hoi. hieu van chat ((truc va) OR (thuc vat)) danh le cua tre.
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky ((nang xa) or (sang ma)) hoi. hieu van chat ((truc va) or (thuc vat)) danh le cua tre*.