Perhaps you should try some spelling variations:
danh sai » dung sai, danh bat, danh dau
sach ky » sac ky, sach ty, sach kem
sai cua » dai cua, hai cua, lai cua
va danh » va dinh, va dan, va hanh
hieu he » hieu ve, hiem he, hieu hien
cua tre » cua te, cuu tre, cua triet
hieu le » hieu ve, hieu ly, tieu le
nang xa » nang x, lang xa, nang ma
thu va » thuc va, thue va, tu va

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