Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, hieu ve
ty doanh » ly doanh, te doanh, tri doanh
dang phi » dang thi, lang phi, dang khoi
ban dang » ban hang, ban dan, van dang
cao duc » dao duc, cao suc, giao duc
phi cuu » nhim cuu, phai cua
duc ban » duc tan, duc van, dua ban
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
tay hoi » tay ho, tao hoi, tay thai
cay cho » cap cho, cao cho, cay co
cuu tre » cua tre, cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty doanh ((cay cho) or (tay hoi)). ((hieu van) or (lieu va)) cao duc ban dang phi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty doanh ((cay cho) OR (tay hoi)). ((hieu van) OR (lieu va)) cao duc ban dang phi cuu tre.
• Adding a wildcard symbol may retrieve word variants: so sach ty doanh ((cay cho) or (tay hoi)). ((hieu van) or (lieu va)) cao duc ban dang phi cuu tre*.