Perhaps you should try some spelling variations:
sach thue » sach thu, sach thieu, sach tham
hanh dai » hanh tai, hanh dao, vanh dai
tu sach » thu sach, su sach, te sach
mang xa » lang xa, mang may, dang xay
hieu ly » hieu ky, lieu ly, dieu ly
va hanh » van hanh, va thanh, va danh
hieu y » hieu ky, hiem y, dieu y

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach thue ((mang xa) or (nang x)) hoi. ((hieu y) OR (hieu ly)) pham duc va hanh dai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thue ((mang xa) OR (nang x)) hoi. ((hieu y) OR (hieu ly)) pham duc va hanh dai cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thue ((mang xa) or (nang x)) hoi. ((hieu y) OR (hieu ly)) pham duc va hanh dai cua vat".
• Adding a wildcard symbol may retrieve word variants: tu sach thue ((mang xa) or (nang x)) hoi. ((hieu y) OR (hieu ly)) pham duc va hanh dai cua vat*.