Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
nhung cong » dung cong, thong cong, hang cong
cong hach » cong sach, cong thanh, cong khanh
hach toan » thanh toan, manh toan
tang van » dang van, hoang van, trong van
toan tap » toan ban
tang va » trang va, thang va, tang vat

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((dieu hanh) or (chieu xanh)) - hanh ((tang va) OR (tang van)) nhung cong hach toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((dieu hanh) OR (chieu xanh)) - hanh ((tang va) OR (tang van)) nhung cong hach toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((dieu hanh) or (chieu xanh)) - hanh ((tang va) OR (tang van)) nhung cong hach toan tap".
• Adding a wildcard symbol may retrieve word variants: theo ((dieu hanh) or (chieu xanh)) - hanh ((tang va) OR (tang van)) nhung cong hach toan tap*.