Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
dang xay » dang van, van xay
tu sach » thu sach, su sach, te sach
tai cuu » tai cuc, tai buu, tai cua
va cham » va chat, va tham
sach ty » sach y, sach tu, sach thu
tang ma » mang may, tang van
cuu tre » cua tre, cau tren, cau treo
va cam » va cac, va cao, va cai
gia » giao

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

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