Perhaps you should try some spelling variations:
sach thue » sach thu, sach thieu, sach tham
va thanh » gia thanh, ban thanh, va tinh
cac duc » cac du, cao duc, cac dac
lai cua » dai cua, hai cua, lai chau
va hanh » van hanh, va danh, ban hanh
cua tre » cua te, cuu tre, cua triet
sach tu » sach thu, cach tu, sach ty
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ve cac » va cac, vien cac

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 tu) or (sach thue)) nang xa hoi. hieu ve cac duc ((va hanh) OR (va thanh)) lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach tu) OR (sach thue)) nang xa hoi. hieu ve cac duc ((va hanh) OR (va thanh)) lai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach tu) or (sach thue)) nang xa hoi. hieu ve cac duc ((va hanh) OR (va thanh)) lai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach tu) or (sach thue)) nang xa hoi. hieu ve cac duc ((va hanh) OR (va thanh)) lai cua tre*.