Perhaps you should try some spelling variations:
cuon sach » duong sach, cuoc cach, co sach
thanh vai » thanh hai, thanh van, thanh tai
phap thuc » phap thu, phap hoc, phap tu
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
vai cuu » vai cua
thuc va » thuc vat, thuc dan, thuc day
cuu tre » cua tre, cau tren, cau treo
hieu va » hieu qua
xang xa » lang xa, mang xa, ang xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (cuon sach)) ty xang xa hoi. ((hieu va) OR (lieu va)) phap thuc va thanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (cuon sach)) ty xang xa hoi. ((hieu va) OR (lieu va)) phap thuc va thanh vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (cuon sach)) ty xang xa hoi. ((hieu va) OR (lieu va)) phap thuc va thanh vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (cuon sach)) ty xang xa hoi. ((hieu va) OR (lieu va)) phap thuc va thanh vai cuu tre*.