Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thanh vai » thanh hai, thanh van, thanh tai
va thanh » gia thanh, ban thanh, va tinh
sach ty » sach y, sach tu, sach thu
tang ma » mang may, tang van
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
du va » dau va, tu va, su 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 ((tang ma) or (lang xa)) hoi. hieu va cac du va thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ty ((tang ma) OR (lang xa)) hoi. hieu va cac du va thanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: thuat sach ty ((tang ma) or (lang xa)) hoi. hieu va cac du va thanh vai cua tre*.