Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thanh tai » thanh hai, thanh toan, doanh tai
thanh oai » thanh hai, thanh toan, thanh hoa
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
xay hoi » xa hoi, tay hoi, cay phoi
tu dang » thu dang, su dang, vu dang
co tuc » co thuc, co tu, co toc
tuc va » thuc va, truc va, tuc xa
va co » vo co

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ((tu dang) OR (tu dong)) xay hoi. hieu va co tuc va ((thanh oai) or (thanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ((tu dang) OR (tu dong)) xay hoi. hieu va co tuc va ((thanh oai) OR (thanh tai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ((tu dang) OR (tu dong)) xay hoi. hieu va co tuc va ((thanh oai) or (thanh tai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ((tu dang) OR (tu dong)) xay hoi. hieu va co tuc va ((thanh oai) or (thanh tai)) cua tre*.