Perhaps you should try some spelling variations:
ban doanh » van doanh, san doanh, ban danh
tu sach » thu sach, su sach, te sach
ty nang » ky nang, ty xang, ty hang
nang ho » nang hoc, nang co, tang ho
cuu tre » cua tre, cau tren, cau treo
hieu ve » hieu va, hieu van
cac duc » cac du, cac dac, cac nuoc
sach ty » sach y, sach tu, sach thu
cao duc » dao duc, cao suc, giao duc
cua te » cua tu
ho hoi » hoc hoi, hoa hoi, hoi hoi

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 nang ho hoi. hieu ve ((cac duc) or (cao duc)) ban doanh tai ((cuu tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang ho hoi. hieu ve ((cac duc) OR (cao duc)) ban doanh tai ((cuu tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ho hoi. hieu ve ((cac duc) or (cao duc)) ban doanh tai ((cuu tre) or (cua te))*.