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