Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
hieu cach » hieu cac, chieu sach, hieu ca
doanh cua » doanh luan
nhung don » nhung van, nhung bo
hang cong » dang cong, hang nong, bang cong
hoc hieu » hoc thieu, hoc hien, doc hieu
toan tai » toan tap, doanh tai, toan cao
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu cach - doanh doanh cua ((nhung don) or (hang cong)) dan ((toan tai) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu cach - doanh doanh cua ((nhung don) OR (hang cong)) dan ((toan tai) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc hieu cach - doanh doanh cua ((nhung don) or (hang cong)) dan ((toan tai) or (toan ban))*.