Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
sach ty » sach tu, sach thu, xach tay
lang xa » lang ha, dang xay, lang van
nam duc » nam duoc, nam thuc, nam buoc
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 thanh 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 thanh 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 thanh lai cua tre*.