Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh hai » thanh hai, nhanh hai, hang hai
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
hai cua » thai cua, dai cua, hoi cua
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 hai 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 hai 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 hai cua tre*.