Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
van hanh » van thanh, ban hanh, van anh
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang xa
hieu va » lieu va, hieu qua
cao duc » dao duc, cao suc, giao duc
cuu tre » cua tre, cau tren, cau treo
va cao » va cac, va co, va dao
di cuu » di cau, di cua, dinh cuu

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 ty xang xa hoi. hieu va cao duc ((van hanh) or (may tinh)) di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ty xang xa hoi. hieu va cao duc ((van hanh) OR (may tinh)) di cuu tre.
• Adding a wildcard symbol may retrieve word variants: thuoc sach ty xang xa hoi. hieu va cao duc ((van hanh) or (may tinh)) di cuu tre*.