Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sang » chieu sach, chieu xanh, hieu lang
cua khong » cua phuong, cua thuong, cua cong
hua khong » hoa khong, hoac khong, phuc khong
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: theo chieu sang - canh tranh ((cua khong) or (hua khong)) cong tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sang - canh tranh ((cua khong) OR (hua khong)) cong tac toan tap*.