Perhaps you should try some spelling variations:
sach kho » bach khoa, sach dao, sach nha
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
hanh vai » hanh vi, hanh va, hanh tai
te sach » toc sach
tang ma » tang van
thuc xa » thuc xay, tuc xa, thuc va
xa hanh » xa thanh, xa khanh, va hanh
vai cuu » vai cua
cuu tre » cua tre, cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach kho ((tang ma) OR (mang may)) hoi. hieu van nam thuc xa hanh vai cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach kho ((tang ma) OR (mang may)) hoi. hieu van nam thuc xa hanh vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach kho ((tang ma) OR (mang may)) hoi. hieu van nam thuc xa hanh vai cuu tre*.