Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh lai » hanh lam, hanh tai, thanh lap
sach ty » sach tu, sach thu, xach tay
lang xa » lang ha, dang xay, lang van
nam duc » nam duoc, nam thuc, nam buoc
va hanh » van hanh, va thanh, va danh
lai cua » dai cua, hai cua, lai chau
cua tre » cua te, cuu tre, cua triet

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