Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hanh tai » thanh tai, hang tai, han tai
sach ty » sach y, sach tu, sach thu
tai cua » thai cua, tai cuc, tri cua
va tham » van tham, va cham, va thanh
hieu va » lieu va, hieu qua
dai moi » doi moi
dai hoi » dai hoc, dai hai
cua tre » cua te, cuu tre, cua triet
lo va » lo van, lao va, le va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ty xang ((dai hoi) OR (dai moi)). hieu va tham ((lo va) or (ly va)) hanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ty xang ((dai hoi) OR (dai moi)). hieu va tham ((lo va) OR (ly va)) hanh tai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ty xang ((dai hoi) OR (dai moi)). hieu va tham ((lo va) or (ly va)) hanh tai cua tre*".