Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
chieu sang » chieu sach, chieu xanh, hieu lang
canh thanh » danh thanh, anh thanh, nhanh thanh
dung cong » dung trong
qua dung » quang dung, su dung, qua song
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 tinh) or (chieu sang)) - ((canh thanh) OR (canh tranh)) qua dung cong tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu tinh) OR (chieu sang)) - ((canh thanh) OR (canh tranh)) qua dung cong tac toan tap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu tinh) or (chieu sang)) - ((canh thanh) OR (canh tranh)) qua dung cong tac toan tap*".