Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
hieu van » hieu va, thien van, lieu va
van chat » cao chat
danh dai » danh dau, danh di, danh sai
sach ky » sac ky, sach y, sach ty
nang xa » lang xa, nang ma, mang xa
truc va » thuc va, trung va
cua te » cua tu

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

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