Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
chieu xanh » chieu sach, chieu sang, chieu tinh
dung cong » dung trong
tranh va » tranh van, trang va, trinh va
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan tap » toan ban
va dung » van dung, va duong, vat dung

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 xanh)) - canh tranh va dung cong tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (chieu xanh)) - canh tranh va dung cong tac toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) or (chieu xanh)) - canh tranh va dung cong tac toan tap*.