Perhaps you should try some spelling variations:
sach thue » sach thu, sach thieu, sach tham
hanh dai » hanh dao, vanh dai, thanh dat
hanh tai » thanh tai, hang tai, han tai
tu sach » thu sach, su sach, te sach
mang xa » lang xa, mang may, dang xay
hieu y » hieu ky, hieu ly, hiem y
y pham » my pham, d pham, v pham

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 pham duc va ((hanh dai) OR (hanh tai)) 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 pham duc va ((hanh dai) OR (hanh tai)) 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 pham duc va ((hanh dai) OR (hanh tai)) cua vat".
• Adding a wildcard symbol may retrieve word variants: tu sach thue ((mang xa) or (nang x)) hoi. hieu y pham duc va ((hanh dai) OR (hanh tai)) cua vat*.