Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
ban thanh » ban hanh, ban hang
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
dang do » nang doc, dang duc, dung doi
sach ty » sach y, sach tu, sach thu
van cac » van hac, van cau, van bac
cac duc » cac du, cao duc, cac dac
duc ban » duc tan, duc van, dua ban
hang do » hang doi, hang di, hang du
cuu tre » cua tre, cau tren, cau treo
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ty ((hang do) or (dang do)) thoi. hieu van cac duc ban thanh tai ((cuu tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty ((hang do) OR (dang do)) thoi. hieu van cac duc ban thanh tai ((cuu tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: thu sach ty ((hang do) or (dang do)) thoi. hieu van cac duc ban thanh tai ((cuu tre) or (cua te))*.