Perhaps you should try some spelling variations:
thieu sang » thieu khang, thieu quang, hieu lang
chieu sang » chieu sach, chieu xanh, hieu lang
hanh sinh » hanh tinh, hanh dinh, hinh sinh
vat hang » van hang, va hang, mat hang
dat hang » dat khanh, dat quang, tat thang
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan tap » toan 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 ((thieu sang) or (chieu sang)) - hanh sinh ((vat hang) or (dat hang)) cong tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (chieu sang)) - hanh sinh ((vat hang) OR (dat hang)) cong tac toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) or (chieu sang)) - hanh sinh ((vat hang) or (dat hang)) cong tac toan tap*.