Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
ban thanh » ban hanh, ban hang
thien van » thi van
hieu van » hieu va, lieu va, hieu ve
tu sach » thu sach, su sach, te sach
duc ban » duc tan, duc van, dua ban
cuu tre » cua tre, cau tren, cau treo
cac duc » cac du, cao duc, cac dac
sach ly » sach y, sach lo, sach ty
do thoi » dao thoi, doi thoi, do thi
hang do » hang doi, dang do, hang di
ly hang » ly quang
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: tu sach ly hang do thoi. ((hieu van) or (thien van)) cac duc ban thanh tai ((cuu tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly hang do thoi. ((hieu van) OR (thien van)) cac duc ban thanh tai ((cuu tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: tu sach ly hang do thoi. ((hieu van) or (thien van)) cac duc ban thanh tai ((cuu tre) or (cua te))*.